Function
Catalyzes the reduction of arsenate [As(V)] to arsenite [As(III)] (PubMed:1409657, PubMed:8003493, PubMed:10606519, PubMed:11862551, PubMed:12072565, PubMed:12682056, PubMed:16797027). In vitro, has also low phosphatase activity with para-nitrophenyl phosphate (pNPP) as substrate (PubMed:11573087).