Sequences of four other proteins of the complex. The following sequences were obtained from the p170, p43, and p23 bands associated with heavy chains as described in MATERIALS AND METHODS. The sequences of UDP-GT (A), the ER Hsp40 cochaperone-ERdj3 (B), cyclophilin B (C), and SDF2-L1 (D). The peptide sequences obtained for each protein are shown in bold.