1. The oxidation of l-3-glycerophosphate by flight-muscle mitochondria isolated from the flesh fly Sarcophaga barbata has been studied. Use of substrate analogues indicates that the catalytic and effector l-3-glycerophosphate binding sites on the allosteric l-3-glycerophosphate-flavoprotein oxidoreductase differ markedly in specificity. 2. The l-3-glycerophosphate-cyanoferrate oxidoreductase sy...

1. Lysosome-rich fractions were obtained from foetal liver tissues as early as 35 days uterine age. Foetal lysosomes showed the same ;structure-linked latency' and acid hydrolytic potentiality characteristic of their adult counterparts. 2. The osmotic stability of lysosome-rich fraction from foetal guinea-pig liver tissue was greater than that of the corresponding adult lysosome fractions, p-ni...

The regulation of proinsulin biosynthesis in pancreatic beta-cells is vital for maintaining optimal insulin stores for glucose-induced insulin release. The majority of nutrient fuels that induce insulin release also stimulate proinsulin biosynthesis, but since insulin exocytosis and proinsulin synthesis involve different cellular mechanisms, a point of divergence in the respective metabolic sti...

Beta-carotene (BC) is a nutrient in vegetables and precursor of vitamin A. BC has been reported to have anticarcinogenic, antiaging, antioxidation properties prevents heart diseases. Recently, gained significant attention due stimulating effect on osteoblast differentiation. Poly(lactic acid)/hydroxyapatite (PLA/HAp) core-shell nanoparticles earlier with load capacity 250% for water-insoluble s...

Administration of clofibrate to adult mice (20-25 mg of clofibrate/day) increased liver glycerophosphate acyltransferase (EC 2.3.1.15) activity by 2.3-fold within 24 h. This increased glycerophosphate acyltransferase activity was mainly localized in the liver microsomal fraction. Three other hypolipidemic drugs, i.e. Bezafibrate (Boehringer Mannheim Co.), Gemfibrozil (Warner-Lambert Co.) and Wy...

A rise in extracellular D-glucose concentration causes in pancreatic islets a preferential stimulation of aerobic, relative to total, glycolysis. The possible participation in such a phenomenon of a glucose-induced and Ca(2+)-dependent activation of FAD-glycerophosphate dehydrogenase was investigated. In islet homogenates, the activity of the mitochondrial and Ca(2+)-responsive FAD-glycerophosp...