Figure 3.

Sequence and location of the three tryptic peptides (A, B, and C) obtained from purified bQR₂ compared with the deduced protein sequences of hQR₂ (231 amino acids; M_r 25,952) and hQR₁ (274 amino acids; M_r 30,832). The tryptic peptides correspond to the QR sequence as follows: A, residues 6–16; B, residues 55–74; C, residues 204–211. Among the 39 amino acids of the tryptic peptides sequenced there is 82% (32 of 39) identity between hQR₂ and the purified bQR₂. Note that this similarity is much closer than 49% identity between hQR₁ and hQR₂ in the overlapping region (231 amino acids from the N terminus).