The heats of combustion of glycerol 1-phosphate, glycerol 2-phosphate and glucose 1-phosphate
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Enzymic formation of Glycerol 1:2-cyclic phosphate.
Glycerol 1:2-cyclic phosphate is released simultaneously with glycerophosphate when kidney glycerophosphinicocholine diesterase (EC 3.1.4.2) acts on glycerylphosphorylcholine and glycerylphosphorylethanolamine. The percentage of cyclic phosphate ester formed is increased at pH values below the optimum and is decreased when Mg2+ or Ca2+ is added to stimulate the reaction.
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Protein allosteric pathways are investigated in the imidazole glycerol phosphate synthase heterodimer in an effort to elucidate how the effector (PRFAR, N'-[(5'-phosphoribulosyl)formimino]-5-aminoimidazole-4-carboxamide ribonucleotide) activates glutaminase catalysis at a distance of 25 Å from the glutamine-binding site. We apply solution NMR techniques and community analysis of dynamical netwo...
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Electrophoretic analysis of extracts of 12 bumblebee species revealed complex patterns of extramitochondrial diphosphopyridine nucleotide-dependent glycerol 3-phosphate dehydrogenase (EC 1.1.1.8) variants. Most Bombus species show one pattern, while Bombus nevadensis has a second and Bombus occidentalis a third pattern. All three Psithyrus (i.e. parasitic bumblebee) species tested have a fourth...
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The pink portion of the rabbit harderian gland was found to be a rich source of ATP: I-alkyl-sn-glycerol phosphotransferase. The enzyme, associated with the microsomal fraction of the gland, exhibits a pH optimum of ‘7.1. ATP and Mg2f are absolute requirements for enzymatic activity; the apparent K,,, for Mg2+ATP is 1.6 mM. Manganese partially substituted for Mgz+, but the measured rate in the ...
متن کاملThe glycerol phosphate, dihydroxyacetone phosphate and monoacylglycerol pathways of glycerolipid synthesis in rat adipose-tissue homogenates.
1. Fat-free homogenates from the epididymal fat-pads of rats were used to measure the rate of palmitate esterification with different substrates. The effectiveness of the acyl acceptors decreased in the order glycerol phosphate, dihydroxyacetone phosphate, 2-octadecenyl-glycerol and 2-hexadecylglycerol. 2. Glycerol phosphate and dihydroxyacetone phosphate inhibited their rates of esterification...
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ژورنال
عنوان ژورنال: Biochemical Journal
سال: 1957
ISSN: 0306-3283
DOI: 10.1042/bj0660451