uridine

1. cytidine + H2O + H(+) = uridine + NH4(+)

Catalysed by CDA

1. uridine:phosphate alpha-D-ribosyltransferase

Catalysed by UPP2, UPP1cytosolOne of 2 routes

1. inosine + UMP = uridine + IMP

Catalysed by NT5C2

1. uridine/cytidine kinase (ITP)

Catalysed by UCK2, UCK1cytosol

1. uridine:phosphate alpha-D-ribosyltransferase

Catalysed by UPP2, UPP1cytosol

1. uridine + phosphate = alpha-D-ribose 1-phosphate + uracil

Catalysed by UPP2, UPP1

1. uridine:phosphate alpha-D-ribosyltransferase
2. 5,6-dihydrouracil:NAD+ oxidoreductase

Catalysed by UPP2, UPP1cytosolOne of 3 routes

1. uridine:phosphate alpha-D-ribosyltransferase
2. purine nucleoside phosphorylase (nicotinamide)

Catalysed by UPP2, UPP1, PNPcytosol

1. uridine:phosphate alpha-D-ribosyltransferase
2. 5,6-dihydrouracil:NAD+ oxidoreductase
3. 5,6-dihydrouracil + H2O = 3-(carbamoylamino)propanoate + H(+)

Catalysed by UPP2, UPP1, DPYScytosol

1. uridine:phosphate alpha-D-ribosyltransferase
2. purine nucleoside phosphorylase (nicotinamide)
3. 1-(beta-D-ribofuranosyl)-1,4-dihydronicotinamide + a quinone + H(+) = beta-nicotinamide D-riboside + a quinol

Catalysed by UPP2