UMP biosynthetic process pyrimidine ribonucleotide salvage UMP salvage biological_process jl 2009-10-21T11:32:33Z GO:0044206 UMP biosynthesis via nucleoside salvage pathway UMP biosynthetic process via nucleoside salvage pathway Any process which produces UMP, uridine monophosphate, from derivatives of it (e.g. cytidine, uridine, cytosine) without de novo synthesis.