>2bt2E (E:) observed residues (from ATOM records)
enlyfqsmrnfsedvlgwresfdlllsskngvaafhaflktefseenlefwlaceefkki
rsatklasrahqifeeficseapkevnidhetreltrmnlqtatatcfdaaqgktrtlme
kdsyprflkspayrdlaaqasaa