>5b1zB (B:) observed residues (from ATOM records)
msqsnrelvvdflsyklsqkgyswsqmaavkqalreagdefelryrrafsdltsqlhitp
gtayqsfeqvvnelfrdgvnwgrivaffsfggalcvesvdkemqvlvsriaawmatylnd
hlepwiqenggwdtfvelygnnaa