1.8.2.1 ? x * 62000 + x * 70000 + x * 74000, SDS-PAGE -, 394088 1.8.2.1 ? x * 72000, SDS-PAGE 765785 1.8.2.1 dimer 1 * 40600 + 1 * 8800, SDS-PAGE 658970 1.8.2.1 dimer 2 * 52000, wild type enzyme, sedimentation equilibrium analysis 667714 1.8.2.1 dimer alphabeta 658705 1.8.2.1 heterodimer - 667744, 694023 1.8.2.1 heterodimer 2 * 40600 + 2 * 8800 394087 1.8.2.1 heterodimer heterodimeric complex of the catalytic molybdopterin subunit and a c-type cytochrome subunit 669353 1.8.2.1 homodimer - 743146 1.8.2.1 homodimer 2 * 40000, SDS-PAGE 694036