>4an7A (A:) observed residues (from ATOM records)
ivggytcaansipyqvslnsgshfcggslinsqwvvsaahcyksriqvrlgehnidvleg
neqfinaakiithpnfngntldndimliklsspatlnsrvatvslprscaaagteclisg
wgntkssgssypsllqclkapvlsdssckssypgqitgnmicvgfleggkdscqgdsggp
vvcngqlqgivswgygcaqknkpgvytkvcnyvnwiqqtiaan