The cDNA fragment was inserted at the MCS of the pBC SK+ vector (Cm resistance; http://www.stratagene.com/vectors/selection/plasmid1.htm) with sequences including attB1 and attB2 sites : TACGACTCACTATAGGGCGAATTGGGTACCACAAGTTTGTACAAAAAAGCAGGCTGTCGA-(5' end of cDNA), (3' end of cDNA)-GCGGCCGCCACCCAGCTTTCTTGTACAAAGTGGTGAGCTC.