Chains and heterogens:
PDB Chain Sequences:
>2nlrA (A:) dtticepfgtttiqgryvvqnnrwgstapqcvtatdtgfrvtqadgsaptngapksypsv fngchytncspgtdlpvrldtvsaapssisygfvdgavynasydiwldptartdgvnqte imiwfnrvgpiqpigspvgtasvggrtwevwsggngsndvlsfvapsaisgwsfdvmdfv ratvarglaendwyltsvqagfepwqngaglavnsfsstvet