Chains and heterogens:
PDB Chain Sequences:
>1k23A (A:) mekilifghqnpdtdticsaiayadlknklgfnaepvrlgqvngetqyaldyfkqesprl vetaanevngvilvdhnerqqsikdieevqvlevidhhrianfetaeplyyraepvgcta tilnkmykennvkiekeiaglmlsaiisdsllfksptctdqdvaaakelaeiagvdaeey glnmlkagadlskktveelisldakeftlgskkveiaqvntvdiedvkkrqaeleavisk vvaeknldlfllvitdilendslalaigneaakvekafnvtlenntallkgvvsrkkqvv pvltdam
>1k23B (B:) mekilifghqnpdtdticsaiayadlknklgfnaepvrlgqvngetqyaldyfkqesprl vetaanevngvilvdhnerqqsikdieevqvlevidhhrianfetaeplyyraepvgcta tilnkmykennvkiekeiaglmlsaiisdsllfksptctdqdvaaakelaeiagvdaeey glnmlkagadlskktveelisldakeftlgskkveiaqvntvdiedvkkrqaeleavisk vvaeknldlfllvitdilendslalaigneaakvekafnvtlenntallkgvvsrkkqvv pvltdam
>1k23C (C:) mekilifghqnpdtdticsaiayadlknklgfnaepvrlgqvngetqyaldyfkqesprl vetaanevngvilvdhnerqqsikdieevqvlevidhhrianfetaeplyyraepvgcta tilnkmykennvkiekeiaglmlsaiisdsllfksptctdqdvaaakelaeiagvdaeey glnmlkagadlskktveelisldakeftlgskkveiaqvntvdiedvkkrqaeleavisk vvaeknldlfllvitdilendslalaigneaakvekafnvtlenntallkgvvsrkkqvv pvltdama
>1k23D (D:) mekilifghqnpdtdticsaiayadlknklgfnaepvrlgqvngetqyaldyfkqesprl vetaanevngvilvdhnerqqsikdieevqvlevidhhrianfetaeplyyraepvgcta tilnkmykennvkiekeiaglmlsaiisdsllfksptctdqdvaaakelaeiagvdaeey glnmlkagadlskktveelisldakeftlgskkveiaqvntvdiedvkkrqaeleavisk vvaeknldlfllvitdilendslalaigneaakvekafnvtlenntallkgvvsrkkqvv pvltdam
>1k23D (D:) mekilifghqnpdtdticsaiayadlknklgfnaepvrlgqvngetqyaldyfkqesprl vetaanevngvilvdhnerqqsikdieevqvlevidhhrianfetaeplyyraepvgcta tilnkmykennvkiekeiaglmlsaiisdsllfksptctdqdvaaakelaeiagvdaeey glnmlkagadlskiaqvntvdiedvlvitdilendsvsrkkqvvpvltdam