1.7.7.1 monomer 1 * 66000 -, 727542 1.7.7.1 monomer 1 * 68000 SDS-PAGE 394401 1.7.7.1 monomer SDS-PAGE 394399 1.7.7.1 additional information spinach: the native enzyme with a molecular weight of 85000 can be split into a modified form with a MW of 61000 that retains activity with the non-physiological electron-donor methyl viologen, but loses most of the ferredoxin-linked activity and an 24000 MW coupling protein fragment in which the ferredoxin-binding domain is located 394408, 394411