>4zy3A (A:) observed residues (from ATOM records)
grliytaggyfrqslsyleaynpsngswlrladlqvprsglagcvvggllyavggrnnsp
dgntdssaldcynpmtnqwspcasmsvprnrigvgvidghiyavggshgcihhssverye
perdewhlvapmltrrigvgvavlnrllyavggfdgtnrlnsaecyypernewrmitpmn
tirsgagvcvlhnciyaaggydgqdqlnsverydvetetwtfvapmrhhrsalgitvhqg
kiyvlggydghtfldsvecydpdsdtwsevtrmtsgrsgvgvavt