Fig. 1. Recombinant proteins of PFLP, PFLP-GC and PFLP-A549 prepared from transformants of E. coli M15. (a) Schematic diagrams of gene constructs. cDNA of d-pflp, d-pflp-GC and d-pflp-A549 were created by PCR and cloned into the pQE30 vector with restriction enzymes Bam HI and Hind III. (b) Silver staining of purified proteins in SDS-PAGE. Proteins were purified from E. coli M15 harboring pQE30 plasmid that containing cDNA of d-pflp (PFLP), d-pflp-GC (PFLP-GC), d-pflp-A549 (PFLP-A549) and vector (pQE30 alone). The purified proteins were separated in 15% (w/v) SDS-PAGE and visualized by silver staining.