>2x4dA (A:) observed residues (from ATOM records)
smapwgkrlagvrgvlldisgvlydsgagggtaiagsveavarlkrsrlkvrfctnesaa
sraelvgqlqrlgfdiseqevtapapaacqilkerglrpyllihdgvrsefdqidtsnpn
cvviadagesfsyqnmnnafqvlmelekpvlislgkgryyaatsglmldvgpymkaleya
cgikaevvgkpspeffksalqaigveahqavmigddivgdvggaqrcgmralqvrtgkfr
psdehhpevkadgyvdnlaeavdlllqhad