>4k33A (A:) observed residues (from ATOM records)
lpadpkwelsrarltlgkplgegafgqvvmaeaigidkdraakpvtvavkmlkddatdkd
lsdlvsememmkmigkhkniinllgactqggplyvlveyaakgnlreflrarrppgldys
fdtseqltfkdlvscayqvargmeylasqkcihrdlaarnvlvtednvmkiadfglardv
hnldyykettngrlpvkwmapealfdrvythqsdvwsfgvllweiftlggspypgipvee
lfkllkeghrmdkpancthdlymimrecwhaapsqrptfkqlvedldrvltvt