Restriction map for pFN21AB6278
 (Circular) (Six-base) MAPSORT of: pFN21AB6278.seq  Check: 2941  from: 1  to: 7048



pFN21AB6278  7048 bp

 With 182 enzymes: SgfI * 

                        April 15, 2010 09:27  ..

AarI CACCTGCnnnn'nnnn_

Cuts at:   3500    3500 
   Size:       7048
 
AatII G_ACGT'C

Cuts at:    278     331     414     600    1536    4858     278 
   Size:         53      83     186     936    3322    2468

  Fragments arranged by size: 

                3322    2468     936     186      83      53
 
AccI GT'mk_AC

Cuts at:   1937    3604    4391    1937 
   Size:       1667     787    4594

  Fragments arranged by size: 

                4594    1667     787
 
Acc65I G'GTAC_C

Cuts at:   3839    4369    3839 
   Size:        530    6518
 
AclI AA'CG_TT

Cuts at:   1563    3398    5175    5548    1563 
   Size:       1835    1777     373    3063

  Fragments arranged by size: 

                3063    1835    1777     373
 
AcuI CTGAAGnnnnnnnnnnnnnn_nn'

Cuts at:   1632    2417    2562    3084    3092    3159    3305    3696    5111 
   Size:        785     145     522       8      67     146     391    1415

Cuts at:   5111    6495    6763    1632 
   Size:       1384     268    1917

  Fragments arranged by size: 

                1917    1415    1384     785     522     391     268     146
                 145      67       8
 
AflII C'TTAA_G

Cuts at:    820    1017    3730     820 
   Size:        197    2713    4138

  Fragments arranged by size: 

                4138    2713     197
 
AflIII A'CryG_T

Cuts at:   1203    5947    6924    1203 
   Size:       4744     977    1327

  Fragments arranged by size: 

                4744    1327     977
 
AgeI A'CCGG_T

Cuts at:   5879    5879 
   Size:       7048
 
AhdI GACnn_n'nnGTC

Cuts at:   5777    5777 
   Size:       7048
 
AleI CACnn'nnGTG

Cuts at:   1166    1166 
   Size:       7048
 
AlfI GCAnnnnnnTGCnnnnnnnnnn_nn'

Cuts at:   1184    4163    1184 
   Size:       2979    4069
 
AlwNI CAG_nnn'CTG

Cuts at:   4328    4791    6363    4328 
   Size:        463    1572    5013

  Fragments arranged by size: 

                5013    1572     463
 
ApaI G_GGCC'C

Cuts at:   2266    2266 
   Size:       7048
 
ApaLI G'TGCA_C

Cuts at:   5105    6261    5105 
   Size:       1156    5892
 
ApoI r'AATT_y

Cuts at:   1493    2437    2613    3430    4043    4357    4583    4735    6844 
   Size:        944     176     817     613     314     226     152    2109

Cuts at:   6844    1493 
   Size:       1697

  Fragments arranged by size: 

                2109    1697     944     817     613     314     226     176
                 152
 
AseI AT'TA_AT

Cuts at:    160    1032    2874    2964    5602     160 
   Size:        872    1842      90    2638    1606

  Fragments arranged by size: 

                2638    1842    1606     872      90
 
AsiSI GCG_AT'CGC

Cuts at:   2001    2001 
   Size:       7048
 
AvaI C'yCGr_G

Cuts at:   1870    1943    2842    4373    1870 
   Size:         73     899    1531    4545

  Fragments arranged by size: 

                4545    1531     899      73
 
BaeI ACnnnnGTAyCnnnnnnn_nnnnn'

Cuts at:   2787    2820    2787 
   Size:         33    7015
 
BamHI G'GATC_C

Cuts at:   4378    4745    4378 
   Size:        367    6681
 
BanI G'GyrC_C

Cuts at:    618     943    1160    1787    3839    4369    5824     618 
   Size:        325     217     627    2052     530    1455    1842

  Fragments arranged by size: 

                2052    1842    1455     627     530     325     217
 
BanII G_rGCy'C

Cuts at:   1391    2266    3925    4367    1391 
   Size:        875    1659     442    4072

  Fragments arranged by size: 

                4072    1659     875     442
 
BbsI GAAGACnn'nnnn_

Cuts at:    928    1899    3911     928 
   Size:        971    2012    4065

  Fragments arranged by size: 

                4065    2012     971
 
BcgI CGAnnnnnnTGCnnnnnnnnnn_nn'

Cuts at:   1903    1937    5239    5273    1903 
   Size:         34    3302      34    3678

  Fragments arranged by size: 

                3678    3302      34      34
 
BciVI GTATCCnnnnn_n'

Cuts at:   4940    6150    4940 
   Size:       1210    5838
 
BclI T'GATC_A

Cuts at:   1548    1548 
   Size:       7048
 
BglI GCCn_nnn'nGGC

Cuts at:    136     243     365     436    1067    1672    5659     136 
   Size:        107     122      71     631     605    3987    1525

  Fragments arranged by size: 

                3987    1525     631     605     122     107      71
 
BglII A'GATC_T

Cuts at:   3103    7043    3103 
   Size:       3940    3108
 
BlpI GC'TnA_GC

Cuts at:   4465    4465 
   Size:       7048
 
Bme1580I G_kGCm'C

Cuts at:   1790    2266    5109    6265    1790 
   Size:        476    2843    1156    2573

  Fragments arranged by size: 

                2843    2573    1156     476
 
BmgBI CAC'GTC

Cuts at:   1318    2056    1318 
   Size:        738    6310
 
BmrI ACTGGGnnnn_n'

Cuts at:    442     858     911     994    1393    1417    4779    5737     442 
   Size:        416      53      83     399      24    3362     958    1753

  Fragments arranged by size: 

                3362    1753     958     416     399      83      53      24
            
 
BmtI G_CTAG'C

Cuts at:   1056    1056 
   Size:       7048
 
BpmI CTGGAGnnnnnnnnnnnnnn_nn'

Cuts at:   1239    3516    3963    5708    1239 
   Size:       2277     447    1745    2579

  Fragments arranged by size: 

                2579    2277    1745     447
 
BpuEI CTTGAGnnnnnnnnnnnnnn_nn'

Cuts at:   5173    6038    6336    5173 
   Size:        865     298    5885

  Fragments arranged by size: 

                5885     865     298
 
BsaI GGTCTCn'nnnn_

Cuts at:    882    1499    5711     882 
   Size:        617    4212    2219

  Fragments arranged by size: 

                4212    2219     617
 
BsaAI yAC'GTr

Cuts at:    493    1204    4839     493 
   Size:        711    3635    2702

  Fragments arranged by size: 

                3635    2702     711
 
BsaBI GATnn'nnATC

Cuts at:   7042    7042 
   Size:       7048
 
BsaHI Gr'CG_yC

Cuts at:    275     328     411     597    1533    3473    4855    5237    5872 
   Size:         53      83     186     936    1940    1382     382     635

Cuts at:   5872     275 
   Size:       1451

  Fragments arranged by size: 

                1940    1451    1382     936     635     382     186      83
                  53
 
BsaWI w'CCGG_w

Cuts at:   5481    5879    6153    6300    6711    5481 
   Size:        398     274     147     411    5818

  Fragments arranged by size: 

                5818     411     398     274     147
 
BsaXI ACnnnnnCTCCnnnnnnn_nnn'

Cuts at:   1178    1208    1373    1403    2324    2354    3514    3544    1178 
   Size:         30     165      30     921      30    1160      30    4682

  Fragments arranged by size: 

                4682    1160     921     165      30      30      30      30
            
 
BseRI GAGGAGnnnnnnnn_nn'

Cuts at:   1186    2252    2255    2328    1186 
   Size:       1066       3      73    5906

  Fragments arranged by size: 

                5906    1066      73       3
 
BseYI C'CCAG_C

Cuts at:   6251    6747    6251 
   Size:        496    6552
 
BsgI GTGCAGnnnnnnnnnnnnnn_nn'

Cuts at:   1163    1736    2286    1163 
   Size:        573     550    5925

  Fragments arranged by size: 

                5925     573     550
 
BsiEI CG_ry'CG

Cuts at:   1540    1815    2001    2250    4498    5259    6287    1540 
   Size:        275     186     249    2248     761    1028    2301

  Fragments arranged by size: 

                2301    2248    1028     761     275     249     186
 
BsiHKAI G_wGCw'C

Cuts at:   2320    3925    5109    5194    6265    2320 
   Size:       1605    1184      85    1071    3103

  Fragments arranged by size: 

                3103    1605    1184    1071      85
 
BsmI GAATG_Cn'

Cuts at:   3631    3937    4559    4652    3631 
   Size:        306     622      93    6027

  Fragments arranged by size: 

                6027     622     306      93
 
Bsp1286I G_dGCh'C

Cuts at:   1391    1790    2266    2320    3925    4367    5109    5194    6265 
   Size:        399     476      54    1605     442     742      85    1071

Cuts at:   6265    1391 
   Size:       2174

  Fragments arranged by size: 

                2174    1605    1071     742     476     442     399      85
                  54
 
BspEI T'CCGG_A

Cuts at:   6711    6711 
   Size:       7048
 
BspHI T'CATG_A

Cuts at:   4937    6667    4937 
   Size:       1730    5318
 
BspMI ACCTGCnnnn'nnnn_

Cuts at:    844    2207    2542    3079    3500    4403     844 
   Size:       1363     335     537     421     903    3489

  Fragments arranged by size: 

                3489    1363     903     537     421     335
 
BsrBI CCG'CTC

Cuts at:   1394    1823    2012    2179    2947    4935    1394 
   Size:        429     189     167     768    1988    3507

  Fragments arranged by size: 

                3507    1988     768     429     189     167
 
BsrDI GCAATG_nn'

Cuts at:     65    1248    5543    5717      65 
   Size:       1183    4295     174    1396

  Fragments arranged by size: 

                4295    1396    1183     174
 
BsrFI r'CCGG_y

Cuts at:   1700    1810    5692    5879    1700 
   Size:        110    3882     187    2869

  Fragments arranged by size: 

                3882    2869     187     110
 
BsrGI T'GTAC_A

Cuts at:     96    3187      96 
   Size:       3091    3957
 
BssHII G'CGCG_C

Cuts at:   1925    1925 
   Size:       7048
 
BssSI C'ACGA_G

Cuts at:   5108    6120    5108 
   Size:       1012    6036
 
BstAPI GCAn_nnn'nTGC

Cuts at:    794    3433     794 
   Size:       2639    4409
 
BstBI TT'CG_AA

Cuts at:   5852    5852 
   Size:       7048
 
BstEII G'GTnAC_C

Cuts at:   1184    1184 
   Size:       7048
 
BstXI CCAn_nnnn'nTGG

Cuts at:   2328    2328 
   Size:       7048
 
BstYI r'GATC_y

Cuts at:   1972    2529    3103    4378    4745    5130    5147    6599    6685 
   Size:        557     574    1275     367     385      17    1452      86

Cuts at:   6685    6697    7043    1972 
   Size:         12     346    1977

  Fragments arranged by size: 

                1977    1452    1275     574     557     385     367     346
                  86      17      12
 
BstZ17I GTA'TAC

Cuts at:   3605    3605 
   Size:       7048
 
BtgI C'CryG_G

Cuts at:    513    1065    2092    3268     513 
   Size:        552    1027    1176    4293

  Fragments arranged by size: 

                4293    1176    1027     552
 
BtgZI GCGATGnnnnnnnnnn'nnnn_

Cuts at:    487    1170    1226    2205     487 
   Size:        683      56     979    5330

  Fragments arranged by size: 

                5330     979     683      56
 
BtsI GCAGTG_nn'

Cuts at:   4564    5358    5378    4564 
   Size:        794      20    6234

  Fragments arranged by size: 

                6234     794      20
 
ClaI AT'CG_AT

Cuts at:   1554    1554 
   Size:       7048
 
CspCI CAAnnnnnGTGGnnnnnnnnnn_nn'

Cuts at:    529     564     529 
   Size:         35    7013
 
DraI TTT'AAA

Cuts at:   4352    4352 
   Size:       7048
 
DrdI GACnn_nn'nnGTC

Cuts at:    809    1316    6055     809 
   Size:        507    4739    1802

  Fragments arranged by size: 

                4739    1802     507
 
EaeI y'GGCC_r

Cuts at:      8      62    1487    1537    1812    1830    2089    2190    2247 
   Size:         54    1425      50     275      18     259     101      57

Cuts at:   2247    4495    5384    7013       8 
   Size:       2248     889    1629      43

  Fragments arranged by size: 

                2248    1629    1425     889     275     259     101      57
                  54      50      43      18
 
EagI C'GGCC_G

Cuts at:   1537    1812    2247    4495    1537 
   Size:        275     435    2248    4090

  Fragments arranged by size: 

                4090    2248     435     275
 
EarI CTCTTCn'nnn_

Cuts at:   1353    2581    3013    3135    3672    3829    4978    1353 
   Size:       1228     432     122     537     157    1149    3423

  Fragments arranged by size: 

                3423    1228    1149     537     432     157     122
 
EciI GGCGGAnnnnnnnnn_nn'

Cuts at:    387    1451    1589    4255    5635    6009    6155     387 
   Size:       1064     138    2666    1380     374     146    1280

  Fragments arranged by size: 

                2666    1380    1280    1064     374     146     138
 
EcoICRI GAG'CTC

Cuts at:   3923    3923 
   Size:       7048
 
Eco57MI CTGrAGnnnnnnnnnnnnnn_nn'

Cuts at:   1239    1632    2417    2562    3084    3092    3159    3305    3516 
   Size:        393     785     145     522       8      67     146     211

Cuts at:   3516    3696    3963    5111    5708    6495    6763    1239 
   Size:        180     267    1148     597     787     268    1524

  Fragments arranged by size: 

                1524    1148     787     785     597     522     393     268
                 267     211     180     146     145      67       8
 
EcoO109I rG'GnC_Cy

Cuts at:   2262    2263    2262 
   Size:          1    7047
 
EcoRI G'AATT_C

Cuts at:   4357    4735    4357 
   Size:        378    6670
 
EcoRV GAT'ATC

Cuts at:   4285    4285 
   Size:       7048
 
FalI AAGnnnnnCTTnnnnnnnn_nnnnn'

Cuts at:   4304    4304 
   Size:       7048
 
FspI TGC'GCA

Cuts at:   5554    5554 
   Size:       7048
 
HaeII r_GCGC'y

Cuts at:   1678    6195    1678 
   Size:       4517    2531
 
Hin4I GAynnnnnvTCnnnnnnnn_nnnnn'

Cuts at:   1373    1405    1540    1572    2324    2356    3898    3910    3930 
   Size:         32     135      32     752      32    1542      12      20

Cuts at:   3930    3942    5689    5721    5763    5795    1373 
   Size:         12    1747      32      42      32    2626

  Fragments arranged by size: 

                2626    1747    1542     752     135      42      32      32
                  32      32      32      20      12      12
 
HincII GTy'rAC

Cuts at:    669    1657    1938    4392    4638     669 
   Size:        988     281    2454     246    3079

  Fragments arranged by size: 

                3079    2454     988     281     246
 
HindIII A'AGCT_T

Cuts at:    748     748 
   Size:       7048
 
HpaI GTT'AAC

Cuts at:   4638    4638 
   Size:       7048
 
KpnI G_GTAC'C

Cuts at:   3843    4373    3843 
   Size:        530    6518
 
MfeI C'AATT_G

Cuts at:   2724    4647    2724 
   Size:       1923    5125
 
MluI A'CGCG_T

Cuts at:   6924    6924 
   Size:       7048
 
MmeI TCCrACnnnnnnnnnnnnnnnnnn_nn'

Cuts at:   1305    6162    6346    1305 
   Size:       4857     184    2007

  Fragments arranged by size: 

                4857    2007     184
 
MscI TGG'CCA

Cuts at:     10      64    1489    1832      10 
   Size:         54    1425     343    5226

  Fragments arranged by size: 

                5226    1425     343      54
 
MslI CAynn'nnrTG

Cuts at:    518    1166    4032    5006    5365    5524     518 
   Size:        648    2866     974     359     159    2042

  Fragments arranged by size: 

                2866    2042     974     648     359     159
 
MspA1I CmG'CkG

Cuts at:   1606    2150    3331    4464    5141    6289    6534    1606 
   Size:        544    1181    1133     677    1148     245    2120

  Fragments arranged by size: 

                2120    1181    1148    1133     677     544     245
 
NcoI C'CATG_G

Cuts at:    513    1065    3268     513 
   Size:        552    2203    4293

  Fragments arranged by size: 

                4293    2203     552
 
NdeI CA'TA_TG

Cuts at:    387     387 
   Size:       7048
 
NheI G'CTAG_C

Cuts at:   1052    1052 
   Size:       7048
 
NotI GC'GGCC_GC

Cuts at:   2247    4495    2247 
   Size:       2248    4800
 
NspI r_CATG'y

Cuts at:   1132    1229    4406    5951    1132 
   Size:         97    3177    1545    2229

  Fragments arranged by size: 

                3177    2229    1545      97
 
PasI CC'CwG_GG

Cuts at:   1348    1348 
   Size:       7048
 
PciI A'CATG_T

Cuts at:   5947    5947 
   Size:       7048
 
PflMI CCAn_nnn'nTGG

Cuts at:   1108    2696    3887    1108 
   Size:       1588    1191    4269

  Fragments arranged by size: 

                4269    1588    1191
 
PfoI T'CCnGG_A

Cuts at:   3337    3616    3337 
   Size:        279    6769
 
PmeI GTTT'AAAC

Cuts at:   4352    4352 
   Size:       7048
 
PpiI GAACnnnnnCTCnnnnnnnn_nnnnn'

Cuts at:   5117    5149    6630    6662    5117 
   Size:         32    1481      32    5503

  Fragments arranged by size: 

                5503    1481      32      32
 
PshAI GACnn'nnGTC

Cuts at:   1613    1613 
   Size:       7048
 
PsiI TTA'TAA

Cuts at:   4618    4618 
   Size:       7048
 
PspOMI G'GGCC_C

Cuts at:   2262    2262 
   Size:       7048
 
PsrI GAACnnnnnnTACnnnnnnn_nnnnn'

Cuts at:   4243    4275    4243 
   Size:         32    7016
 
PstI C_TGCA'G

Cuts at:    830    2109    2204    2869    3643    4195    4400     830 
   Size:       1279      95     665     774     552     205    3478

  Fragments arranged by size: 

                3478    1279     774     665     552     205      95
 
PvuI CG_AT'CG

Cuts at:   2001    2001 
   Size:       7048
 
PvuII CAG'CTG

Cuts at:   3331    3331 
   Size:       7048
 
SacI G_AGCT'C

Cuts at:   3925    3925 
   Size:       7048
 
SalI G'TCGA_C

Cuts at:   1936    4390    1936 
   Size:       2454    4594
 
SapI GCTCTTCn'nnn_

Cuts at:   2581    2581 
   Size:       7048
 
SbfI CC_TGCA'GG

Cuts at:   4400    4400 
   Size:       7048
 
ScaI AGT'ACT

Cuts at:   5296    7008    5296 
   Size:       1712    5336
 
SfcI C'TryA_G

Cuts at:    826    1045    2105    2200    2865    3171    3588    3639    4191 
   Size:        219    1060      95     665     306     417      51     552

Cuts at:   4191    4396    5531    6212    6403     826 
   Size:        205    1135     681     191    1471

  Fragments arranged by size: 

                1471    1135    1060     681     665     552     417     306
                 219     205     191      95      51
 
SgfI GCG_AT'CGC

Cuts at:   2001    2001 
   Size:       7048
 
SgrAI Cr'CCGG_yG

Cuts at:   1700    1700 
   Size:       7048
 
SmaI CCC'GGG

Cuts at:   1872    4375    1872 
   Size:       2503    4545
 
SmlI C'TyrA_G

Cuts at:    820    1017    1943    3730    5152    6053    6315     820 
   Size:        197     926    1787    1422     901     262    1553

  Fragments arranged by size: 

                1787    1553    1422     926     901     262     197
 
SnaBI TAC'GTA

Cuts at:    493    4839     493 
   Size:       4346    2702
 
SpeI A'CTAG_T

Cuts at:    152     152 
   Size:       7048
 
SphI G_CATG'C

Cuts at:   1132    4406    1132 
   Size:       3274    3774
 
SspI AAT'ATT

Cuts at:      5      52    2457    2794    3160    4222    4972       5 
   Size:         47    2405     337     366    1062     750    2081

  Fragments arranged by size: 

                2405    2081    1062     750     366     337      47
 
StuI AGG'CCT

Cuts at:   1517    1517 
   Size:       7048
 
StyI C'CwwG_G

Cuts at:    513    1065    2049    3268    4487     513 
   Size:        552     984    1219    1219    3074

  Fragments arranged by size: 

                3074    1219    1219     984     552
 
TaqII GACCGAnnnnnnnnn_nn'

Cuts at:    325    1580    5075    5092    5245    5430    5875     325 
   Size:       1255    3495      17     153     185     445    1498

  Fragments arranged by size: 

                3495    1498    1255     445     185     153      17
 
TatI w'GTAC_w

Cuts at:     96     370     450     483     534    1977    3038    3187    3406 
   Size:        274      80      33      51    1443    1061     149     219

Cuts at:   3406    3736    3972    4142    5294    7006      96 
   Size:        330     236     170    1152    1712     138

  Fragments arranged by size: 

                1712    1443    1152    1061     330     274     236     219
                 170     149     138      80      51      33
 
TstI CACnnnnnnTCCnnnnnnn_nnnnn'

Cuts at:   3249    3281    3514    3546    3961    3993    7008    7040    3249 
   Size:         32     233      32     415      32    3015      32    3257

  Fragments arranged by size: 

                3257    3015     415     233      32      32      32      32
            
 
Tth111I GACn'n_nGTC

Cuts at:   1316    1316 
   Size:       7048
 
XbaI T'CTAG_A

Cuts at:   2824    4384    2824 
   Size:       1560    5488
 
XcmI CCAnnnn_n'nnnnTGG

Cuts at:   2540    2540 
   Size:       7048
 
XhoI C'TCGA_G

Cuts at:   1943    1943 
   Size:       7048
 
XmaI C'CCGG_G

Cuts at:   1870    4373    1870 
   Size:       2503    4545
 
XmnI GAAnn'nnTTC

Cuts at:   2662    5177    2662 
   Size:       2515    4533
 
ZraI GAC'GTC

Cuts at:    276     329     412     598    1534    4856     276 
   Size:         53      83     186     936    3322    2468

  Fragments arranged by size: 

                3322    2468     936     186      83      53
 

 Enzymes that do cut:

     AarI    AatII     AccI   Acc65I     AclI     AcuI    AflII   AflIII
     AgeI     AhdI     AleI     AlfI    AlwNI     ApaI    ApaLI     ApoI
     AseI    AsiSI     AvaI     BaeI    BamHI     BanI    BanII     BbsI
     BcgI    BciVI     BclI     BglI    BglII     BlpI Bme1580I    BmgBI
     BmrI     BmtI     BpmI    BpuEI     BsaI    BsaAI    BsaBI    BsaHI
    BsaWI    BsaXI    BseRI    BseYI     BsgI    BsiEI  BsiHKAI     BsmI
 Bsp1286I    BspEI    BspHI    BspMI    BsrBI    BsrDI    BsrFI    BsrGI
   BssHII    BssSI   BstAPI    BstBI   BstEII    BstXI    BstYI  BstZ17I
     BtgI    BtgZI     BtsI     ClaI    CspCI     DraI     DrdI     EaeI
     EagI     EarI     EciI  EcoICRI  Eco57MI EcoO109I    EcoRI    EcoRV
     FalI     FspI    HaeII    Hin4I   HincII  HindIII     HpaI     KpnI
     MfeI     MluI     MmeI     MscI     MslI   MspA1I     NcoI     NdeI
     NheI     NotI     NspI     PasI     PciI    PflMI     PfoI     PmeI
     PpiI    PshAI     PsiI   PspOMI     PsrI     PstI     PvuI    PvuII
     SacI     SalI     SapI     SbfI     ScaI     SfcI     SgfI    SgrAI
     SmaI     SmlI    SnaBI     SpeI     SphI     SspI     StuI     StyI
    TaqII     TatI     TstI  Tth111I     XbaI     XcmI     XhoI     XmaI
     XmnI     ZraI

 Enzymes that do not cut: 

     AfeI     AloI     AscI    AvrII     BbeI    BbvCI    BfrBI     BplI
   Bpu10I    BsiWI    BsmBI   Bsu36I   DraIII    EcoNI     FseI    FspAI
     KasI     NaeI     NarI   NgoMIV     NruI     NsiI     PacI     PmlI
    PpuMI    PspXI    RsrII    SacII    SanDI    SexAI     SfiI     SfoI
     SrfI     SwaI
Inquiries or Suggestions ?
Send a message to flexiclone AT kazusagt.com