Chains and heterogens:
PDB Chain Sequences:
>2h4xA (A:) mskyklimlrhgegawnkenrfcswvdqklnsegmeearncgkqlkalnfefdlvftsvl nrsihtawlileelgqewvpvesswrlnerhygaliglnreqmalnhgeeqvrlwrrsyn vtpppieeshpyyqeiyndrrykvcdvpldqlprseslkdvlerllpywneriapevlrg ktilisahgnssrallkhlegisdediinitlptgvpilleldenlravgphqflgdqea iqaaikkvedqgkvkqakklehhhhhh
>2h4xA (A:) skyklimlrhgegawnkenrfcswvdqklnsegmeearncgkqlkalnfefdlvftsvln rsihtawlileelgqewvpvesswrlnerhygaliglnreqmalnhgeeqvrlwrrsynv tpppieeshpyyqeiyndrrykvcdvpldqlprseslkdvlerllpywneriapevlrgk tilisahgnssrallkhlegisdediinitlptgvpilleldenlravgphqflgdqeai qaaikkvedqgkvkq
>2h4xB (B:) mskyklimlrhgegawnkenrfcswvdqklnsegmeearncgkqlkalnfefdlvftsvl nrsihtawlileelgqewvpvesswrlnerhygaliglnreqmalnhgeeqvrlwrrsyn vtpppieeshpyyqeiyndrrykvcdvpldqlprseslkdvlerllpywneriapevlrg ktilisahgnssrallkhlegisdediinitlptgvpilleldenlravgphqflgdqea iqaaikkvedqgkvkqakklehhhhhh
>2h4xB (B:) skyklimlrhgegawnkenrfcswvdqklnsegmeearncgkqlkalnfefdlvftsvln rsihtawlileelgqewvpvesswrlnerhygaliglnreqmalnhgeeqvrlwrrsynv tpppieeshpyyqeiyndrrykvcdvpldqlprseslkdvlerllpywneriapevlrgk tilisahgnssrallkhlegisdediinitlptgvpilleldenlravgphqflgdqeai qaaikkvedqgkv