>2z77B (B:) observed residues (from ATOM records)
tqspaliasqsswrcvqahdregwlalmaddvviedpigksvtnpdgsgikgkeavgaff
dthiaanrltvtceetfpssspdeiahilvlhsefdggftsevrgvftyrvnkaglitnm
rgywnldmmtf