
Fig. 2. Effects of ionic strength and pH on binding of 125I-ZP glycoproteins to expressed proacrosin peptide. The relative uptake of unfractionated 125I-ZP glycoproteins to expressed proacrosin peptide (expressed as c.p.m. bound, see Fig. 3) was measured in the presence of (A) 0-400 mM NaCl or (B) pH 3.2-8.0 at 100 mM NaCl.