Chains and heterogens:
PDB Chain Sequences:
>1q4mA (A:) mekrgvidtwidkhrsiytaatrhafvvsirdgsvdlssfrtwlgqdylfvrrfvpfvas vlirackdsgessdmevvlggiaslndeiewfkregskwdvdfstvvpqranqeygrfle dlmssevkypvimtafwaieavyqesfahcledgnktpveltgachrwgndgfkqycssv kniaerclenasgevlgeaedvlvrvlelevafwemsrggq
>1q4mA (A:) gvidtwidkhrsiytaatrhafvvsirdgsvdlssfrtwlgqdylfvrrfvpfvasvlir ackdsgessdmevvlggiaslndeiewfkregskwdvdfstvvpqranqeygrfledlms sevkypvimtafwaieavyqesfahcledgnktpveltgachrwgndgfkqycssvknia erclenasgevlgeaedvlvrvlelevafwemsrg
>1q4mB (B:) mekrgvidtwidkhrsiytaatrhafvvsirdgsvdlssfrtwlgqdylfvrrfvpfvas vlirackdsgessdmevvlggiaslndeiewfkregskwdvdfstvvpqranqeygrfle dlmssevkypvimtafwaieavyqesfahcledgnktpveltgachrwgndgfkqycssv kniaerclenasgevlgeaedvlvrvlelevafwemsrggq
>1q4mB (B:) rgvidtwidkhrsiytaatrhafvvsirdgsvdlssfrtwlgqdylfvrrfvpfvasvli rackdsgessdmevvlggiaslndeiewfkregskwdvdfstvvpqranqeygrfledlm ssevkypvimtafwaieavyqesfahcledgnktpveltgachrwgndgfkqycssvkni aerclenasgevlgeaedvlvrvlelevafwemsrg