Chains and heterogens:
PDB Chain Sequences:
>1bl3A (A:) mhgqvdcspgiwqldcthlegkvilvavhvasgyieaevipaetgqetayfllklagrwp vktvhtdngsnftsttvkaacwwagikqefgipynpqsqgviesmnkelkkiigqvrdqa ehlktavqmavfihnhkrkggiggysagerivdiiatdiq
>1bl3A (A:) spgiwqldcthlegkvilvavhvasgyieaevipaetgqetayfllklagrwpvktvhtd ngsnftsttvkaacwwagikqefgiesmnkelkkiigqvrdqaehlktavqmavfihnhk rkggiggysagerivdiiatdi
>1bl3B (B:) mhgqvdcspgiwqldcthlegkvilvavhvasgyieaevipaetgqetayfllklagrwp vktvhtdngsnftsttvkaacwwagikqefgipynpqsqgviesmnkelkkiigqvrdqa ehlktavqmavfihnhkrkggiggysagerivdiiatdiq
>1bl3B (B:) spgiwqldcthlegkvilvavhvasgyieaevipaetgqetayfllklagrwpvktvhtd ngsnftsttvkaacwwagikqefviesmnkelkkiigqvrdqaehlktavqmavfihnhk rkggiggysagerivdiiatdiq
>1bl3C (C:) mhgqvdcspgiwqldcthlegkvilvavhvasgyieaevipaetgqetayfllklagrwp vktvhtdngsnftsttvkaacwwagikqefgipynpqsqgviesmnkelkkiigqvrdqa ehlktavqmavfihnhkrkggiggysagerivdiiatdiq