>3n63B (B:) observed residues (from ATOM records)
rflkvknwetdvvltdtlhlkstletgctehicmgsivlpvrtkdqlfplakefldqyys
sikrfgskahmdrleevnkeieststyqlkdteliygakhawrnasrcvgriqwsklqvf
dardcttahgmfnyicnhvkyatnkgnlrsaitifpqrtdgkhdfrvwnsqliryagykq
pdgstlgdpanvqfteiciqqgwkaprgrfdvlplllqangndpelfqippelvlevpir
hpkfdwfkdlglkwyglpavsnmlleigglefsacpfsgwymgteigvrnycdnsrynil
eevakkmdldmrktsslwkdqalveiniavlysfqsdkvtivdhhsatesfikhmeneyr
crggcpadwvwivppmsgsitpvfhqemlnyrltpsfeyqpdpwnthvwkg