>1s2nA (A:) observed residues (from ATOM records)
qsnaiwgldridqrnlpldrnynanfdgfgvtayvidtgvnnnheefggrsvsgydfvdn
dadssdcnghgthvagtiggsqygvaknvnivgvrvlscsgsgttsgvisgvdwvaqnas
gpsvanmslgggqstaldsavqgaiqsgvsfmlaagnsnadacntsparvpsgvtvgstt
ssdsrssfsnwgscvdlfapgsqiksawydggyktisgtsmatphvagvaalylqenngl
tplqltgllnsrasenkvsdtrgttnkllysladsgcepdc