>2id3A (A:) observed residues (from ATOM records)
ggrtarireavllaagdalaadgfdaldlgeiarragvgkttvyrrwgtpgglaadllad
maeqslpradtgaleedlranarlvvrtlddprqgrlfraliaaslcneqaaealhrfya
vrvdewagcvrdavargevpdgtdphgvvaavsaplyyallntgrslteadadraaraas
taaragvwvtg