>1y6lB (B:) observed residues (from ATOM records)
stsakriqkelaeitldpppncsagpkgdniyewrstilgppgsvyeggvfflditfspd
ypfkppkvtfrtriyhcninsqgvicldilkdnwspaltiskvllsicslltdcnpadpl
vgsiatqymtnraehdrmarqwtkryat