>1bl3A (A:) observed residues (from ATOM records)
spgiwqldcthlegkvilvavhvasgyieaevipaetgqetayfllklagrwpvktvhtd
ngsnftsttvkaacwwagikqefgiesmnkelkkiigqvrdqaehlktavqmavfihnhk
rkggiggysagerivdiiatdi