>4l15A (A:) observed residues (from ATOM records)
raeptlkhfdeniislieseimsvnneigwadvaglegakkalreivvlpfkrpdvftgi
rappkgvllfgppgtgktmigrcvasqckatffnisassltskwvgegeklvralfsvar
lklpsvifideidsllsshessrrikteflvqldgvntapderllvlgatnrpqeldeaa
rrrfqkrlyialpepesrtqivqnllvgtrhditnhnlerireltdgysgadmrqlctea
amgpirdigddietidkddiravtvmdfaeaarvvrptvddsqldayaawdkkfgclp