Using preparations of peribacteroid membrane (PBM)-enclosed bacteroids from soybean root nodules, we show here that the PBM possesses a dicarboxylate transporter capable of mediating a rapid flux of dicarboxylate anions, such as malate and succinate, to the bacteroids inside the nodule. The transporter has a higher affinity for the monovalent malate anion than for the succinate anion (Km = 2 and 15 μM, respectively) although the Vmax for malate- appears to be lower than for succinate- (Vmax = 11 and 30 nmol·min-1·mg protein-1, respectively). © 1988.
Udvardi, M. K., Price, G. D., Gresshoff, P. M., & Day, D. A. (1988). A dicarboxylate transporter on the peribacteroid membrane of soybean nodules. FEBS Letters, 231(1), 36–40. https://doi.org/10.1016/0014-5793(88)80697-5