| ribulosephosphate | <biochemistry> Ribulose substituted by one or more phosphoric acid moieties. (12 Dec 1998) |
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| ribulosephosphate 3-epimerase | <enzyme> An enzyme catalyzing the reversible interconversion of d-xylulose 5-phosphate and its epimer, d-ribulose 5-phosphate; a step in the nonoxidative phase of the pentose phosphate pathway. Registry number: EC 5.1.3.1 Synonym: d-erythrose 4-phosphate isomerase, pentose-5-phosphate 3-epimerase, phosphoribulose epimerase. (05 Mar 2000) |
| ribwort | <botany> A species of plantain (Plantago lanceolata) with long, narrow, ribbed leaves. Synonym: rib grass, ripple grass, ribwort plantain. Source: Websters Dictionary (01 Mar 1998) |