>4nn0B (B:) observed residues (from ATOM records)
arsafsakrsesrvpppsdaplpfdrvlvneqghydavtgkftcqvpgvyyfavhatvyr
aslqfdlvkngesiasffqffggwpkpaslsggamvrlepedqvwvqvgvgdyigiyasi
ktdstfsgflvysdwhsspvf