Figure 9.

Model of the redox NTR-Trx systems and their putative Prx targets, which may be operating in the mitochondria, cytosol, and plastids of nodule host cells. A putative FTR-Trx system of plastids is also indicated in dashed lines. This model essentially has been built based on the known biochemical specificities observed in vitro. The NTRA/B, NTRC, FNR, Grx, Trxh1, PrxIIB, PrxIIE, PrxIIF, and 2CPrx isoforms were detected by immunoblots and/or proteomic analysis, whereas expression of FTR, Trxo, Trxh4, Trxm, Trxx, and Trxy was detected at the mRNA level. FNR, Ferredoxin-NADP reductase; Fdx, ferredoxin; GR, glutathione reductase; GSH, glutathione.