>4f63B (B:) observed residues (from ATOM records)
seyelpedprwelprdrlvlgkplgegagqvvlaeaiglpnrvtkvavkmlksdatekdl
sdlisememmkmigkhkniinllgactqdgplyviveyaskgnlreylqarrqlsskdlv
scayqvargmeylaskkcihrdlaarnvlvtednvmkiadfgladyykkgrlpvkwmape
alfdriythqsdvwsfgvllweiftlggspypgvpveelfkllkeghrmdkpsnctnely
mmmrdcwhavpsqrptfkqlvedldrivalt