>2id3B (B:) observed residues (from ATOM records) grtarireavllaagdalaadgfdaldlgeiarragvgkttvyrrwgtpgglaadlladm aeqslpradtgaleedlranarlvvrtlddprqgrlfraliaaslcneqaaealhrfyav rvdewagcvrdavargevpdgtdphgvvaavsaplyyallntgrslteadadraaraast aaragvwvtg