The cDNA fragment was inserted at the NotI-EcoRV site
of the pBluescript II SK(+) vector (GenBank Accession No.
X52328, AmpR). The cDNA was cloned into the vector in the 
direction of SacI site to KpnI site of the vector. The NotI 
site at the 3'-end of the cDNA was disrupted by the vector
ligation.