>1x23A (A:) observed residues (from ATOM records)
lgspefmalkrinkelsdlardppaqcsagpvgddmfhwqatimgpndspyqggvfflti
hfptdypfkppkvafttriyhpninsngsicldilrsqwspaltiskvllsicsllcdpn
pddplvpeiariyktdrdkynrisrewtqkyam