This paper describes the substrate specificity, synthetic scope, and efficiency of aldolase catalytic antibodies 38C2 and 33F12. These antibodies use the enamine mechanism common to the natural Class I aldolase enzymes. Substrates for these catalysts, 23 donors and 16 acceptors, have been identified. The aldol acceptor specificity is expected to be much broader than that defined here since all ...

The coniferyl aldehyde dehydrogenase (CALDH) of Pseudomonas sp. strain HR199 (DSM7063), which catalyzes the NAD+-dependent oxidation of coniferyl aldehyde to ferulic acid and which is induced during growth with eugenol as the carbon source, was purified and characterized. The native protein exhibited an apparent molecular mass of 86,000 +/- 5,000 Da, and the subunit mass was 49.5 +/- 2.5 kDa, i...

BACKGROUND Lignocellulosic substrates and pulping process streams are of increasing relevance to biorefineries for second generation biofuels and biochemical production. They are known to be rich in sugars and inhibitors such as phenolic compounds, organic acids and furaldehydes. Phenolic compounds are a group of aromatic compounds known to be inhibitory to fermentative organisms. It is known t...

A dehydrogenase is an enzyme responsible for the breakdown of acetaldehyde, a toxic intermediate1 produced directly from the metabolism of alcohol. Aldehyde dehydrogenase is extraordinarily efficient in keeping acetaldehyde levels very low, even immediately after alcohol consumption when acetaldehyde is being generated rapidly in the liver. Multiple aldehyde dehydrogenase enzymes exist and thei...

in this investigation, nano silica chloride (nano sio2cl) has been found to be efficient, chemoselective and recyclable catalyst for facile and simple synthesis of germinal diacetates from aromatic and heteroaromatic aldehydes in shorter reaction durations. the products were obtained in high to excellent yields. this work consistently has the advantages of excellent yields, short reaction time,...

In the title compound, C(8)H(7)ClO(2), the hydroxyl and aldehyde groups are co-planar with the benzene ring [maximum deviation 0.018 (3) Å], and the Cl-C-C plane is almost perpendicular to the benzene ring [dihedral angle 83.7 (2)°]. An intra-molecular O-H⋯O hydrogen bond occurs between the hydroxyl and aldehyde groups.

The nucleophilic addition of thiocarbamate imidazolium ylide to aldehyde triggered sequential intramolecular N to O migration of thiocarbonyl amide group and reversible oxygen-sulfur rearrangement to afford 2-imidazolium alkylcarbamothioate. The ortho group on phenyl of aldehyde strongly affects the balance of the O- to S-rearrangement.

IT was shown by Mann & Quastel [1937] that choline is oxidized by slices or extracts of rat liver and kidney. The oxidation product was isolated and identified as betaine aldehyde. Some evidence was obtained that betaine aldehyde is also oxidized by the same tissues though at a much slower rate than choline and it was suggested that the oxidation product in this case is betaine. Bernheim & Bern...

INTRODUCTION Polyamidoamine (PAMAM) dendrimers are a unique family of dendritic polymers with numerous pharmaceutical and biomedical applications. One major problem with these polymers is their cytotoxicity. The purpose of this study was to synthesize novel dendrimers with aldehyde terminal groups and compare their cytotoxicity with that of dendri¬mers containing amine-terminated groups. METH...

The kinetic properties of highly purified preparations of sheep liver cytoplasmic aldehyde dehydrogenase (preparations that had been shown to be free from contamination with the corresponding mitochondrial enzyme) were investigated with both propionaldehyde and butyraldehyde as substrates. At low aldehyde concentrations, double-reciprocal plots with aldehyde as the variable substrate are linear...