>1s1iA (A:) observed residues (from ATOM records)
itssqvrehvkellkysnetkkrnfletvelqvglknydpqrdkrfsgslklpncprpnm
sicifgdafdvdrakscgvdamsvddlkklnknkklikklskkynafiasevlikqvprl
lgpqlskagkfptpvshnddlygkvtdvrstikfqlkkvlclavavgnvemeedvlvnqi
lmsvnffvsllkknwqnvgslvvkssmgpafrl