Evidence has been presented in a previous paper (2) that formate is the precursor of carbon atom 2 of histidine in yeast and that the imidazole ring of the amino acid is not derived from the corresponding ring of the purine bases. The present paper is concerned with the origin of the 5 carbon chain of histidine. The studies of Edlbacher (3) indicated that histidine catabolism in liver preparati...

The roles of the two ldh genes of Enterococcus faecalis were studied using knockout mutants. Deletion of ldh-1 causes a metabolic shift from homolactic fermentation to ethanol, formate, and acetoin production, with a high level of formate production even under aerobic conditions. Ldh-2 plays only a minor role in lactate production.

The mechanism of Rh(ii)-catalysed cyclopropanation has been investigated computationally using Rh(2)(formate)(4) as a model precatalyst, with the model organic substrates CH(2)N(2) and C(2)H(4) and MeCl as a model for coordinating solvent. Three potential carriers of catalysis have been identified, one retaining the Rh(2)(formate)(4) framework and two others resulting from ligand insertion of R...

The title compound, bis-[μ-(E)-2-({2-[4-(dimethyl-amino)-benzo-yl]hydrazinyl-idene}meth-yl)phenolato]bis-[formato-zinc], [Zn(2)(C(16)H(16)N(3)O(2))(2)(CHO(2))(2)], is a dinuclear Zn(II) complex containing two Zn(II) cations, two monovalent anions of a Schiff base ligand, 4-dimethyl-amino-N'-(2-hy-droxy-benzyl-idene)benzohydrazide (L), and two formate ions. Each Zn(II) atom chelates with the hy-...

The 2-fluoro derivative of 9-beta-D-arabinofuranosyladenine (2-F-ara-A) and its soluble 5'-formate and 5'-phosphate derivatives were therapeutically effective against the parent leukemia L1210 (L1210/0). 2-F-ara-A and 9-beta-D-arabinofuranosyladenine 5'-formate were inactive aginst a 1-beta-D-arabinofuranosylcytosine-resistant subline (L1210/ara-C) that was deficient in deoxycytidine kinase. De...

The Open University's repository of research publications and other research outputs Electronic state spectroscopy of methyl formate probed by high resolution VUV photoabsorption, He(I) photoelectron spectroscopy and ab initio calculations Journal Article (2010). Electronic state spectroscopy of methyl formate probed by high resolution VUV photoabsorption, He(I) photoelectron spectroscopy and a...

The requirement of Lactobacillus casei and Lactobacillus arabinosus for purine bases is increased when these organisms are grown in the absence of histidine. These and related observations were interpreted to mean that purine bases serve as precursors of histidine for these organisms.1 Recent studies by Levy and Coon2'3 have established that in yeast the imidazole ring of purine bases does not ...

In the centrosymmetric title compound, [CdNi(2)(C(17)H(16)N(2)O(2))(2)(HCOO)(2)(H(2)O)(2)]·2H(2)O, The Ni(II) cation is chelated by a 2,2'-[propane-1,3-diylbis(nitrilo-methanylyl-idene)]diphen-olate (salpn) anion, and further coordinated by a formate anion and a water mol-ecule in a distorted NiN(2)O(4) octa-hedral geometry. The Cd(II) cation, located on an inversion center, is coordinated by f...