Figure 4: Effects of EDTA on the hemolysis of SRBCs by serum from O. tetraspis or M. cataphractus. Incubation of crocodile serum with different concentrations of EDTA resulted in a concentration-dependent inhibition of SRBC hemolysis. The results are expressed as % of maximum hemolysis, relative to a positive control, and represent the results of four independent determinations.