Chains and heterogens:
PDB Chain Sequences:
>2b4fA (A:) afnnnpssvgayssgtyrnlaqemgktniqqkvnstfdnmfgynntqqlyypytengvyk ahyikainpdegddirtegqswgmtaavmlnkqeefdnlwrfakayqknpdnhpdakkqg vyawklklnqngfvykvdegpapageeyfafallnasarwgnsgefnyyndaitmlntik nklmenqiirfspyidnltdpsyhipafydyfannvtnqadknywrqvatksrtllknhf tkvsgsphwnlptflsrldgspvigyifngqanpgqwyefdawrvimnvgldahlmgaqa whksavnkalgflsyaktnnskncyeqvysyggaqnrgcagegqkaanavallastnagq aneffnefwslsqptgdyryyngslymlamlhvsgnfkfynntfn
>2b4fA (A:) afnnnpssvgayssgtyrnlaqemgktniqqkvnstfdnmfgynntqqlyypytengvyk ahyikainpdegddirtegqswgmtaavmlnkqeefdnlwrfakayqknpdnhpdakkqg vyawklklnqngfvykvdegpapageeyfafallnasarwgnsgefnyyndaitmlntik nklmenqiirfspyidnltdpsyhipafydyfannvtnqadknywrqvatksrtllknhf tkvsgsphwnlptflsrldgspvigyifngqanpgqwyefdawrvimnvgldahlmgaqa whksavnkalgflsyaktnnskncyeqvysyggaqnrgcagegqkaanavallastnagq aneffnefwslsqptgdyryyngslymlamlhvsgnfkfynntf