Chains and heterogens:
PDB Chain Sequences:
>1c3fA (A:) kqgptsvayvevnnnsmlnvgkytladgggnafdvavifaaninydtgtktaylhfnenv qrvldnavtqirplqqqgikvllsvlgnhqgagfanfpsqqaasafakqlsdavakygld gvdfndeyaeygnngtaqpndssfvhlvtalranmpdkiislynigpaasrlsyggvdvs dkfdyawnpyygtwqvpgialpkaqlspaaveigrtsrstvadlarrtvdegygvyltyn ldggdrtadvsaftrelygseavrt