>4l7cB (B:) observed residues (from ATOM records)
rliytaggyfrqslsyleaynpsdgtwldladlqvprsglagcvvggllyavggrnnspd
gntdssaldcynpmtnqwspcapmsvprnrigvgvidghiyavggshgcihhnsveryep
erdewhlvapmltrrigvgvavlnrllyavggfdgtnrlnsaecyypernewrmitamnt
irsgagvcvlhnciyaaggydgqdqlnsverydvetetwtfvapmkhrrsalgitvhqgr
iyvlggydghtfldsvecydpdtdtwsevtrmtsgrsgvgvavtle