Figure 1

Standard curves. ELISA run showing typical standard curves and native reactivity against (A) Human serum, plasma, and (B) Rodents: rat serum and plasma and mouse serum. Native material was run undiluted and at 1:2, 1:4 and 1:8 dilutions as indicated by dashed lines. The signal is the optical density at 450 nm, subtracting the background at 650 nm, as a function of peptide concentration.