>3b54B (B:) observed residues (from ATOM records)
ssqtertfiavkpdgvqrglvsqilsrfekkgyklvaiklvkaddklleqhyafpkmvsf
mksgpilatvwegkdvvrqgrtilgatnplgsapgtirgdfgidlgrnvchgsdsvdsae
reinlwfkkeelvdwesnqakwiye