Chains and heterogens:
PDB Chain Sequences:
>1k4sA (A:) qkwkwweeerypegikwkflehkgpvfappyeplpenvkfyydgkvmklspkaeevatff akmldheyttkeifrknffkdwrkemtneekniitnlskcdftqmsqyfkaqtearkqms keeklkikeenekllkeygfcimdnhkerianfkieppglfrgrgnhpkmgmlkrrimpe diiincskdakvpspppghkwkevrhdnkvtwlvswteniqgsikyimlnpssrikgekd wqkyetarrlkkcvdkirnqyredwkskemkvrqravalyfidklalragnekeegetad tvgccslrvehinlhpeldgqeyvvefdflgkdsiryynkvpvekrvfknlqlfmenkqp eddlfdrlntgilnkhlqdlmegltakvfrtynasitlqqqlkeltapdenipakilsyn ranravailcnhqrappktfeksmmnlqtkidakkeqladarrdlksakadakvmkdakt kkvveskkkavqrleeqlmklevqatdreenkqialgtsklnyldpritvawckkwgvpi ekiynktqrekfawaidmadedyef
>1k4sA (A:) qkwkwweeerypegikwkflehkgpvfappyeplpenvkfyydgkvmklspkaeevatff akmldheyttkeifrknffkdwrkemtneekniitnlskcdftqmsqyfkaqtearkqms keeklkikeenekllkeygfcimdnhkerianfkieppglfrgrgnhpkmgmlkrrimpe diiincskdakvpspppghkwkevrhdnkvtwlvswteniqgsikyimlnpssrikgekd wqkyetarrlkkcvdkirnqyredwkskemkvrqravalyfidklalragnekeegetad tvgccslrvehinlhpeldgqeyvvefdflgkdsiryynkvpvekrvfknlqlfmenkqp eddlfdrlntgilnkhlqdlmegltakvfrtynasitlqqqlkeltapdenipakilsyn ranravailcnhreenkqialgtsklnyldpritvawckkwgvpiekiynktqrekfawa idmadedyef