>4yv2B (B:) observed residues (from ATOM records)
gwfreendqwpgqamslrvekvlydaptkfqhltifesdpkgpwgtvmaldgciqvtdyd
efvyhevlghtslcshpkpervliigggdggvlrevlrhgtvehcdlvdidgevmeqskq
hfpqisrsladpratvrvgdglafvrqtpdntydvviidteafykdvlrilkpdgiccnq
gesiwldleliekmsrfiretgfasvqyalmhvptypcgsigtlvcskkagvdvtkplrp
vedmpfakdlkyydsemhkasfalprfarhinn