>4xuiB (B:) observed residues (from ATOM records)
apaavdwrargavtavkdqgqcgscwafsaignvecqwflaghpltnlseqmlvscdktd
sgcsgglmnnafewivqenngavytedsypyasgegisppcttsghtvgatitghvelpq
deaqiaawlavngpvavavdasswmtytggvmtscvseqldhgvllvgyndsaavpywii
knswttqwgeegyiriakgsnqclvkeeassavvg