Semi-artificial photoelectrochemistry combines semiconductors with biocatalysts for selective chemical synthesis powered by sunlight, but the overall energy conversion efficiency of these hybrid systems has remained limited to date. In their Communication on page 26303, Erwin Reisner and co-workers report control local environment a formate dehydrogenase integrated in hierarchical porous TiO2 s...

The enzyme pyruvate formate-lyase (PFL) catalyzes the reversible conversion of pyruvate and CoA into acetyl-CoA and formate, which has a central role in anaerobic glucose fermentation by E. coli cells and other bacteria [1]. PFL a 2 × 85 kDa homodimer is the first example of a radical enzyme where the spin was found to be located on the polypeptide backbone Cα-atom of a glycyl residue (Gly 734)...

The methionine salvage pathway allows the in vivo recovery of the methylthio moiety of methionine upon the formation of methylthioadenosine (MTA) from S-adenosylmethionine (SAM). The Fe(II)-containing form of acireductone dioxygenase (ARD) catalyzes the penultimate step in the pathway in Klebsiella oxytoca, the oxidative cleavage of the acireductone 1,2-dihydroxy-3-oxo-5-(methylthio)pent-1-ene ...

The reaction of methyl chloroformate with catecholamines at the nanogram level in aqueous solution has been estimated. Optimal pH conditions of the aqueous medium were established which provide a quantitative yield of the formate derivative of primary and secondary catecholamines. First the catechol function was blocked by the reaction with methyl chloroformate under mild alkaline conditions (p...

Several recent, reports from this laboratory have implicated vitamin E in the metabolism of the nucleic acids. It was shown that vitamin E-deficient rabbits excrete extra quantities of allantoin (1) and that the livers from such animals exhibit greatly increased xanthine oxidase activities (2). Finally it haa been shown that vitamin E deprivation in the rat, leads to an increased incorporation ...

A complete picture of the reaction mechanism driving photocatalytic reduction CO 2 into formate promoted by Zr-based porphyrinic MOF-545 in CH 3 CN/TEOA solutions is provided for first time combining experimental and computational approaches.

we give the concept of ‘braiding’ for 2-groupoids, and we show that this structure is equivalent tobraided regular, crossed modules.

The rate and products of trichloroethylene (TCE) oxidation by Methylomicrobium album BG8 expressing membrane-associated methane monooxygenase (pMMO) were determined using 14C radiotracer techniques. [(14)C]TCE was degraded at a rate of 1.24 nmol (min mg protein)(-1) with the initial production of glyoxylate and then formate. Radiolabeled CO(2) was also found after incubating M. album BG8 for 5 ...

The title compound, [Zn(2)(CHO(2))(C(8)H(3)O(5))(C(3)H(7)NO)(2)](n), is a three-dimensional metal-organic framework, of which two independent Zn(II) atoms (denoted Zn1 and Zn2) are linked by both 4-oxidoisophthalate and formate bridging ligands. The 4-oxidoisophthalate ligands link two Zn1-type and three Zn2-type atoms, forming a corrugated sheet roughly parallel to the ac plane. The formate io...

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