منابع مشابه
Purification and Properties of Rat Liver Ornithine s-Transaminase*
Pyruvate, oxaloacetate, and P-ketoglutarate were reported to be inactive (4). In contrast, preparations from rat liver were found to be most active with pyruvate, but oc-ketoglutarate, glyoxylate, and a number of other oc-keto acids also were reactive at appreciable rates (5, 6). The equilibrium for Reaction 1 was shown to be very far towards the right, presumably because of spontaneous convers...
متن کاملSynergistic operation of the CAR2 (Ornithine transaminase) promoter elements in Saccharomyces cerevisiae.
Dal82p binds to the UIS(ALL) sites of allophanate-induced genes of the allantoin-degradative pathway and functions synergistically with the GATA family Gln3p and Gat1p transcriptional activators that are responsible for nitrogen catabolite repression-sensitive gene expression. CAR2, which encodes the arginine-degradative enzyme ornithine transaminase, is not nitrogen catabolite repression sensi...
متن کاملOrnithine transaminase in Neurospora and its relation to the biosynthesis of proline.
The mould Neurospora crassa is normally able to interconvert proline and ornithine, since either proline or ornithine will satisfy the growth requirement of certain mutant strains (Srb, Fincham & Bonner, 1950). Another mutant requires proline specifically, while numerous other strains, representing at least four different genetic loci, respond to ornithine but not to proline (Srb & Horowitz, 19...
متن کاملInduction, Partial Purification and Properties of Ornithine Transaminase from Aspergillus nidulans
continue to develop after removal of the filter paper. With very-low-activity components no advantage is gained by leaving the filter paper in contact for more than 20min because of the resultant increase in diffusion and background fluorescence. Permanent records were obtained on Ilford F.P.4 cut film by U.V. flash photography with a Bowen’s Multilec Flashgun with an OX98 Hanovia filter (trans...
متن کاملMating-type effect on cis mutations leading to constitutivity of ornithine transaminase in diploid cells of Saccharomyces cerevisiae.
Cis-acting regulatory mutations have been isolated that affect L-ornithine transaminase (OTAse), an enzyme catalyzing the second step of arginine breakdown in yeast. These mutations lead to constitutive synthesis of OTAse at various levels. Two different types of mutations have been recovered, both of which are tightly linked to the structural gene (cargB) for this enzyme. One type behaves as a...
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ژورنال
عنوان ژورنال: Nature
سال: 1951
ISSN: 0028-0836,1476-4687
DOI: 10.1038/167556a0