>6ex9A (A:) observed residues (from ATOM records)
spgiwqldcthlegkvilvavhvasgyieaevipaetgqetayfllklagrwpvktihtd
ngsnftgatvraacdwagikqefqgvvesmnkelkkiigqvrdqaehlktavqmavfihn
kkrkgysagerivdiiatdi