>4cesB (B:) observed residues (from ATOM records) spgiwqldcthlegkvilvavhvasgyieaevipaetgqetayfllklagrwpvktvhtd ngsnftsttvkaacwwagikqedgipynpqsqgviesmnkelkkiigqvrdqaehlktav qmavfihnhkrkgysagerivdiiatdiq