Transformant screening and protein expression
Recombinant cells were identified by plating on to agar medium
containing ampicillin, X-Gal and IPTG. For protein expression E.
coli DH5_ harboring pUC18 was grown in LB broth to an optical
density at 600 nm and induced with 0.5 mM Isopropylb-Dthiogalactopyranoside
(IPTG). Cells were harvested 3 h later and
total cellular protein was analyzed by electrophoresis in an SDS–
10% polyacrylamide gel.