Chains and heterogens:
PDB Chain Sequences:
>2x3fA (A:) gamtklittvkemqhivkaakrsgttigfiptmgalhdghltmvresvstnditvvsvfv nplqfgpnedfdayprqidkdlelvsevgadivfhpavedmypgelgidvkvgpladvle gakrpghfdgvvtvvnklfnivmpdyayfgkkdaqqlaiveqmvkdfnhaveiigidivr eadglakssrnvylteqerqeavhlskslllaqalyqdgerqskviidkvtqyleshisg rieevavysypqlveqheitgrifislavkfskarlidniiigae
>2x3fA (A:) tklittvkemqhivkaakrsgttigfiptmgalhdghltmvresvstnditvvsvfvnpl qfgpnedfdayprqidkdlelvsevgadivfhpavedmypgelgidvkvgpladvlegak rpghfdgvvtvvnklfnivmpdyayfgkkdaqqlaiveqmvkdfnhaveiigidivread glakssrnvylteqerqeavhlskslllaqalyqdgerqskviidkvtqyleshisgrie evavysypqlveqheitgrifislavkfskarlidniiiga
>2x3fB (B:) gamtklittvkemqhivkaakrsgttigfiptmgalhdghltmvresvstnditvvsvfv nplqfgpnedfdayprqidkdlelvsevgadivfhpavedmypgelgidvkvgpladvle gakrpghfdgvvtvvnklfnivmpdyayfgkkdaqqlaiveqmvkdfnhaveiigidivr eadglakssrnvylteqerqeavhlskslllaqalyqdgerqskviidkvtqyleshisg rieevavysypqlveqheitgrifislavkfskarlidniiigae
>2x3fB (B:) mtklittvkemqhivkaakrsgttigfiptmgalhdghltmvresvstnditvvsvfvnp lqfgpnedfayprqidkdlelvsevgadivfhpavedmypgelgidvkvgpladvlegak rpghfdgvvtvvnklfnivmpdyayfgkkdaqqlaiveqmvkdfnhaveiigidivread glakssrnvylteqerqeavhlskslllaqalyqdgerqskviidkvtqyleshisgrie evavysypqlveqheitgrifislavkfskarlidniiiga