Members of this family include: purine nucleoside phosphorylase (PNP) Uridine phosphorylase (UdRPase) 5'-methylthioadenosine phosphorylase (MTA phosphorylase)

1: Unexpected sequence similarity between nucleosidases and phosphoribosyltransferases of different specificity. Mushegian AR, Koonin EV; Protein Sci 1994;3:1081-1088. PMID:7920254

2: The crystal structure of Escherichia coli purine nucleoside phosphorylase: a comparison with the human enzyme reveals a conserved topology. Mao C, Cook WJ, Zhou M, Koszalka GW, Krenitsky TA, Ealick SE; Structure 1997;5:1373-1383. PMID:9351810