>4na7A (A:) observed residues (from ATOM records)
ivggtasvrgewpwqvtlhttsptqrhlcggsiignqwiltaahcfygvespkilrvysg
ilnqseikedtsffgvqeiiihdqykmaesgydiallklettvnytdsqrpiclpskgdr
nviytdcwvtgwgyrklrdkiqntlqkakiplvtneecqkryrghkithkmicagyregg
kdackgdsggplsckhnevwhlvgitswgegcaqrerpgvytnvveyvdwilektqav