>4r69A (A:) observed residues (from ATOM records)
atlkdqliynllkeeqtpqnkitvvgvgavgmacaisilmkdladelalvdviedklkge
mmdlqhgslflrtpkivsgkdynvtansklviitagarqlnlvqrnvnifkfiipnvvky
spnckllivsnpvdiltyvawkisgfpknrvigsgcnldsarfrylmgerlgvhplschg
wvlgehgdssvpvwsgmnvagvslktlhpdlgtdkdkeqwkevhkqvvesayeviklkgy
tswaiglsvadlaesimknlrrvhpvstmikglygikddvflsvpcilgqngisdlvkvt
ltseeearlkksadtlwgiqkelqf