>3ap4B (B:) observed residues (from ATOM records)
lqniiynpvipfvgtipdqldpgtlivirghvpsdadrfqvdlqngssvkpradvafhfn
prfkragcivcntlinekwgreeitydtpfkreksfeivimvlkdkfqvavngkhtllyg
hrigpekidtlgiygkvnihsigfsf