>1s2nB (B:) observed residues (from ATOM records)
snaiwgldridqrnlpldrnynanfdgfgvtayvidtgvnnnheefggrsvsgydfvdnd
adssdcnghgthvagtiggsqygvaknvnivgvrvlscsgsgttsgvisgvdwvaqnasg
psvanmslgggqstaldsavqgaiqsgvsfmlaagnsnadacntsparvpsgvtvgstts
sdsrssfsnwgscvdlfapgsqiksawydggyktisgtsmatphvagvaalylqennglt
plqltgllnsrasenkvsdtrgttnkllyslad