>1w3sB (B:) observed residues (from ATOM records)
srtanrsgivirrrvtpagdiivtlltpqgklkaiarglssslnlfhhvgvqvyqgphnd
lasvkqavlegalptlaeperyafahlmaefadalfqegefseqafdlfaaslrgvahqp
dpewvalvmsykllglagvipqtarcarcgapdpehpdplggqllcskcaalppyppavl
dflrhavrrtvrasfeqpvpsadrpalwralekfvtvqvggvhswrqlvps