>3ptfB (B:) observed residues (from ATOM records) shmlemalkriqkelsdlqrdppahcsagpvgddlfhwqatimgppdsayqggvffltvh fptdypfkppkiafttkiyhpninsngsicldilrsqwspaltvskvllsicsllcdpnp ddplvpdiaqiyksdkekynrharewtqkyam