>4c52B (B:) observed residues (from ATOM records)
lgsmsqsnrelvvdflsyklsqkgyswsqmaavkqalreagdefelryrrafsdltsqlh
itpgtayqsfeqvvnelfrdgvnwgrivaffsfggalcvesvdkemqvlvsriaawmaty
lndhlepwiqenggwdtfvelygnn