Figure 1

The SDS–PAGE gel of the VHH-B11. M1: the protein marker (Fermentas, USA). (A) Lane 1: the VHH-B11 antibody expressed by BL21 E. coli (pET28a); lane 2: the VHH-B11 expressed by TG1 E. coli (pMECS); lane B: blank control; lane 3: the VHH-B11 expressed by HB2151 E. coli (pMECS); (B) lane 4: the VHH-B11 expressed by P. pastoris X33 (pPICZα); lane 5: the VHH-B11 expressed by HEK293F (pCDNA3.4).