Fig. 3From: Structure-based antigenic epitope and PEGylation improve the efficacy of staphylokinaseAnti-Sak IgG levels of the unmodified Sak and PEG-Sak-Cys. The anti-Sak igG immunoresponse to the unmodified Sak and peg-Sak-cys in serum dilution of 1:500, 1:1000, 1:2000 and 1:4000, respectively. (**P < 0.01 compared with unmodified Sak)Back to article page