>1w3sA (A:) observed residues (from ATOM records)
rsrtanrsgivirrrvtpagdiivtlltpqgklkaiargssslnlfhhvgvqvyqgphnd
lasvkqavlegalptlaeperyafahlmaefadalfqegefseqafdlfaaslrgvahqp
dpewvalvmsykllglagvipqtarcarcgapdpehpdplggqllcskcaalppyppavl
dflrhavrrtvrasfeqpvpsadrpalwralekfvtvqvggvhswrqlvp