Figure 1.

Deduced amino acid sequence from the cDNA sequence of S₃-RNase from L. peruvianum (Royo et al., 1994). Arrows with numbers indicate peptides generated from trypsin digestion of S-pyridylethylated S₃-RNase characterized in Table I. Predicted structural motifs (α-helices A–F and β-sheets 1–7) are indicated above the amino acid sequence. Branch structure designates the N-glycosylation site. The asterisk represents the site of S-pyridylethylation. Dotted lines show positions of disulfide bonds determined in this study.