>2b1xD (D:) observed residues (from ATOM records)
rvsdttvreitewlymeaelldagkyrewlalvtedlsyvvpirvtrereavtdvvegmt
hmdddadsmemrvlrleteyawaedppsrsrhfvtnvrvatgdsedefkvtsnlllyrtr
gdvatydvlsgertdvlrragdsflmakrvvlldqttimthnlalim