>4n1bA (A:) observed residues (from ATOM records)
rliytaggyfrqslsyleaynpsdgtwldladlqvprsglagcvvggllyavggrnnspd
gntdssaldcynpmtnqwspcapmsvprnrigvgvidghiyavggshgcihhnsveryep
erdewhlvapmltrrigvgvavlnrllyavggfdgtnrlnsaecyypernewrmitamnt
irsgagvcvlhnciyaaggydgqdqlnsverydvetetwtfvapmkhrrsalgitvhqgr
iyvlggydghtfldsvecydpdtdtwsevtrmtsgrsgvgvavtle