Chains and heterogens:
PDB Chain Sequences:
>3brxA (A:) hhatltvpttvpsvsedceqlrkafsgwgtnegliidilghrnaeqrnlirktyaetyge dllkaldkelsndferlvllwaldpaerdallaneatkrwtssnqvlmeiactrsanqll harqayharykksleedvahhttgdfhklllplvssyryegeevnmtlakteakllheki snkaysdddvirvlatrskaqinatlnhykneygndinkdlkadpkdeflallrstvkcl vypekyfekvlrlainrrgtdegaltrvvctraevdlkviadeyqrrnsvpltraivkdt hgdyeklllvlaghven