Function
Transports electrons between flavodoxin or ferredoxin and NADPH (PubMed:8449868, PubMed:9839946, PubMed:12234497, PubMed:21306142). Reduces flavodoxin 1, flavodoxin 2 and ferredoxin, ferredoxin being the kinetically and thermodynamically preferred partner (PubMed:12234497). Required for the activation of several enzymes such as pyruvate formate-lyase, anaerobic ribonucleotide reductase and cobalamin-dependent methionine synthase (PubMed:7042345, PubMed:8267617).