abstract：:The interaction between dipalmitoyl lecithin and egg lecithin with insulin was studied in a non-aqueous solvent such as dioxane-chloroform (1:1) by dielectric constant measurements and absorption spectra. The electrostatic character of the interaction results from the dielectric measurements and the effect of an exter...

journal_title：Molecular and cellular biochemistry

authors： Galzigna L,Garbin L,Rigoni F,Siliprandi N

更新日期：1980-03-20 00:00:00

abstract：:In this review, various experiments which establish the occurrence of covalent modification mechanisms, both in vivo and in vitro, in the control of acetyl-CoA carboxylase have been presented. It is interesting to note that phosphorylation of the carboxylase results in disaggregation of the active species. These studi...

journal_title：Molecular and cellular biochemistry

authors： Kim KH

更新日期：1979-12-14 00:00:00

abstract：:Pre-purified preparations of myoinositol-1-phosphate synthase (E.C. 5.5.1.4) from rat testes can be purified to homogeneity by first crystallizing the enzyme according to JAKOBY and then recrystallizing it at a pH value close to the isoelectric point while slowly increasing the temperature from 0 to 15 degrees C. This...

journal_title：Molecular and cellular biochemistry

authors： Pittner F,Hoffmann-Ostenhof O

更新日期：1979-12-14 00:00:00

abstract：:This paper describes a purification procedure and some properties of a nonspecific nucleoside phosphotransferase of chick embryo, an activity which catalyzes the transfer of chick embryo, an activity which catalyzes the transfer of the phosphate ester from a deoxyribonucleotide or a pyrimidine ribonucleotide to a deox...

journal_title：Molecular and cellular biochemistry

authors： Tesoriere G,Vento R,Calvaruso G,Taibi G

更新日期：1979-06-15 00:00:00

abstract：:Liver glycogen synthase b phosphatase, chromatographically separable from phosphorylase a phosphatase, is decreased in 48-hour alloxan diabetic rats. The phosphatase activities are measured in an in vitro system using exogenous isolated phospho-enzyme as substrates with added phosphatases. Synthase and phosphorylase p...

journal_title：Molecular and cellular biochemistry

authors： Gold AH,Dickemper D,Haverstick DM

更新日期：1979-05-06 00:00:00

abstract：:Chemical and enzymatic properties of four collagenases newly isolated from anaerobic Clostridium histolyticum, aerobic Achromobacter iophagus, and from two lower eucaryotes, the fungus Entomophthora coronata and the insect Hypoderma lineatum are reviewed. The problems of their biosynthesis and precursors, namely the e...

journal_title：Molecular and cellular biochemistry

authors： Keil B

更新日期：1979-01-26 00:00:00

abstract：:This article summarizes recent ultrastructure findings from our laboratory and documents some of the information accumulated primarily since 1975 from many laboratories. Special attention is given to documentation by scanning electron microscopy which affords insight into platelet activation (adhesion, aggregation, re...

journal_title：Molecular and cellular biochemistry

authors： Barnhart MI

更新日期：1978-12-22 00:00:00

abstract：:Human and bovine nasal proteoglycan complex components were prepared in parallel. Some molecular properties of human and bovine proteoglycan subunits (PGS) were compared. Two major human "link-like proteins" have been characterized and purified; their compositions and molecular weights were very similar to those obser...

journal_title：Molecular and cellular biochemistry

authors： Périn JP,Bonnet F,Jollès P

更新日期：1978-11-01 00:00:00

abstract：:A calcium activated photoprotein, termed mnemiopsin, which emits bioluminescence upon the addition of calcium ion, has been isolated from the Ctenophore, Memiopsis leidyi, and purified by hollow fiber techniques. The system is similar to aequorin, from the jellyfish Aequorea, except that mnemiopsin can be light-inacti...

journal_title：Molecular and cellular biochemistry

authors： Girsch SJ,Hastings JW

更新日期：1978-04-11 00:00:00

abstract：:The action of micrococcal nuclease, DNase I and DNase II on mouse TLT hepatoma chromatin revealing the periodicity of its structure as visualized by denaturing and non-denaturing gel electrophoresis, was consistent with the action of these enzymes on other chromatins. Micrococcal nuclease showed a complex subnucleosom...

journal_title：Molecular and cellular biochemistry

authors： Duerksen JD,Connor KW

更新日期：1978-04-11 00:00:00

abstract：:Extracts of fasted rat diaphragms, previously treated with or without insulin were assayed for glycogen synthase, protein kinase and cyclic [3H]-AMP binding. Treatment with insulin produced an elevation in the % of glycogen synthase I and a concurrent decrease in cyclic AMP-dependent protein kinase activity and cyclic...

journal_title：Molecular and cellular biochemistry

authors： Walkenbach RJ,Hazen R,Larner J

更新日期：1978-02-24 00:00:00

abstract：:The amylase-protein amylase inhibitor system offers a unique model of specific and reversilbe protein-protein interaction. The monomeric and dimeric inhibitors, exhibiting closely related properties and interacting with the same amylase, also provide a convenient test to compare effects of monomer-monomer and monomer-...

journal_title：Molecular and cellular biochemistry

authors： Silano V,Poerio E,Buonocore V

更新日期：1977-12-29 00:00:00

abstract：:1. Two different molecular forms of dopamine-beta-hydroxylase were isolated from human serum; a major component (Peak I enzyme) with a molecular weight of 368000 and with a higher specific activity and a minor component (Peak II enzyme) with a molecular weight of 188000 and with a lower specific activity. 2. Both form...

journal_title：Molecular and cellular biochemistry

authors： Ikeno T,Hashimoto S,Kuzuya H,Nagatsu T

更新日期：1977-12-29 00:00:00

abstract：:The hexokinase: fumarase ratios of mitochondria isolated from ten tissues of the rat were determined, and compared with the tissue content of phosphoglucomutase and phosphorylase, taken as representatives of enzymes concerned with glycogen metabolism. A generally inverse relationship was found between the mitochondria...

journal_title：Molecular and cellular biochemistry

authors： Wilson JE,Felgner PL

更新日期：1977-11-25 00:00:00

abstract：:The Arrhenius plots for the active and low activity soluble forms of the ATPase purified from the membranes of Micrococcus lysodeikticus grown at 30 degrees C presented discontinuities at 30 and 33 degrees C, respectively. Their activation parameters differed, being highest for the low activity form of the enzyme. Bot...

journal_title：Molecular and cellular biochemistry

authors： Ayala J,Carreira J,Nieto M,Muñoz E

更新日期：1977-08-19 00:00:00

abstract：:Partially purified D-aspartate oxidase from beef kidney has been tested in the presence of butanedione or phenylglyoxal, which specifically modify the arginine molecule. The results obtained clearly indicate that arginine residues are involved in the binding of the substrate to the active site of the enzyme. ...

journal_title：Molecular and cellular biochemistry

authors： Crifò C,Santoro L,Rinaldi A,De Marco C

更新日期：1977-08-19 00:00:00

abstract：:The formation of porphyrins from porphobilinogen by a duck blood hemolysate was examined. The system was found to form mainly protoporphyrin IX and hemin, and accumulated lesser amounts of uroporphyrins, hepatacarboxylic porphyrin, and coproporphyrins. By storage at -20 degrees the accumulation of uroporphyrins and he...

journal_title：Molecular and cellular biochemistry

authors： Frydman RB,Frydman B,Feinstein G

更新日期：1977-07-05 00:00:00

abstract：:A literature search has been conducted to see to what extent steady-state kinetics studies in the period 1965-1976 have revealed deviations from Michaelis-Menten kinetics. It was found that over 800 enzymes have been reported as giving complex curves for a variety of reasons and a group by group classification of all ...

journal_title：Molecular and cellular biochemistry

authors： Hill CM,Waight RD,Bardsley WG

更新日期：1977-05-03 00:00:00

abstract：:Cyclic AMP (300 micron) activates phosphofructokinase from dialyzed haemolysates of mature rat erythrocytes. The main conclusions are: a) Cyclic AMP, at pH 7.1 and low concentrations of fructose-6-phosphate, is able to reverse the inhibition produced by different amounts of ATP (up to 1.5 mM). b) The cyclic nucleotide...

journal_title：Molecular and cellular biochemistry

authors： Pinilla M,Luque J

更新日期：1977-05-03 00:00:00

abstract：:Recently it has been demonstrated that hydroxylamine is an activator of triglyceride catabolism. We have studied the effect of hydroxylamine on isocitrate lyase activity and lipid catabolism and have noted a stimulation of isocitrate lyase biosynthesis by 5 mM hydroxylamine. The specificity of this effect was tested w...

journal_title：Molecular and cellular biochemistry

authors： Vanni P,Vincenzini MT,Vincieri F,Baccari V

更新日期：1977-04-12 00:00:00

abstract：:Biochemical and ultrastructural studies indicate that the atrophy of adrenal cortex in hypoyhysectomized rats involves the following changes: (1) One to two days after hypophysectomy, there is loss of "template activity" resulting from cumulative DNA-damage and heterochromatinization. In vivo ACTH-administration led t...

journal_title：Molecular and cellular biochemistry

authors： Tchen TT,Chan SW,Kuo TH,Mostafapour KM,Drzewiecki VH

更新日期：1977-04-12 00:00:00

abstract：:Some properties of a submitochondrial cell-free system for protein synthesis are described. The system was prepared from rat liver mitochondria lysed with Triton X-100, and the lysate was characterized by a linear rate of [14C]amino acid incorporation for 15-20 min with subsequent decline in activity. The incorporatio...

journal_title：Molecular and cellular biochemistry

authors： Kisselev OI,Gaitskhoki VS,Neifakh SA

更新日期：1977-02-04 00:00:00

abstract：:The effects of erythromycin, chloramphenicol, cycloheximide, pyrimethamine, chromate, cadmium, lead, nickel, 4-nitro-quinoline-1-oxide and thioacetamide on yeast and human cells were studied. Inhibition of the synthesis of mitochondrial proteins resulted in the loss of cytochromes as well as in morphological changes i...

journal_title：Molecular and cellular biochemistry

authors： Wilkie D

更新日期：1977-02-04 00:00:00

abstract：:It is well known that mitochondria are only partly an autonomous system since they are subjected to nuclear control. For this reason, in studying mitochondrial genes one has to consider constantly the integration of mitochondrial and nuclear genetic systems. This fact makes experimental approaches still more sophistic...

journal_title：Molecular and cellular biochemistry

authors： Neifakh SA

更新日期：1977-02-04 00:00:00

abstract：:Fat cells were preincubated for 2 h in the presence and absence of growth hormone (GH) and Dexamethasone (Dex) before the addition of increasing concentrations of either epinephrine, theophylline or glucagon and final incubation of the cells for an additional 5 minutes. GH and Dex increased by 85%, 28% and 72%, respec...

journal_title：Molecular and cellular biochemistry

authors： Harris R,Bennun A

更新日期：1976-12-10 00:00:00

abstract：:Nicotinic acid administration, which depletes liver glycogen, leads to an increase of both pyruvate kinase L and phosphoenolypyruvate carboxykinase in liver by a factor of nearly two. The former is not prevented by either cycloheximide or actinomycin D. L-Cysteine, an allosteric inhibitor of pyruvate kinase L, favors ...

journal_title：Molecular and cellular biochemistry

authors： Moreno FJ,Benito M,Sánchez-Medina F,Medina JM,Mayor F

更新日期：1976-11-30 00:00:00

abstract：:The regulation patterns of gastric acid secretion in rats were investigated. Pentagastrin and histamine stimulate gastric acid secretion, but the inhibitors of DNA-dependent synthesis of RNA and of proteins prevent only the pentagastrin action. It has been found that pentagastrin induces histidine decarboxylase in gas...

journal_title：Molecular and cellular biochemistry

authors： Salganik RI,Bersimbaev RI,Argutinskaya SV,Kiseleva EV,Khristolyubova NB,Deribas VI

更新日期：1976-09-30 00:00:00

abstract：:The activity of yeasts citrate synthase in cells grown under different hypoxic conditions has been investigated. A linear relationship between the citrate synthase activity and the respiratory capacity of the cells has been found. When Saccharomyces cerevisiae was grown on fermentable substrates the activity decreased...

journal_title：Molecular and cellular biochemistry

authors： Nuñez de castro I,Arias de Saavedra JM,Machado A,Mayor F

更新日期：1976-09-30 00:00:00

abstract：:The effect of three different carbon sources on the biosynthesis of polyunsaturated fatty acids of the alpha-linolenic acid series was investigated in hepatoma tissue culture (HTC) cells. Alpha linolenic acid was converted to higher homologs by a desaturating route that synthetized mainly 18:4 (delta6, 9, 12, 15), 20:...

journal_title：Molecular and cellular biochemistry

authors： de Alaniz MJ,Brenner RR

更新日期：1976-08-30 00:00:00

abstract：:Chloroplasts from spinach can be separated into at least three different populations by countercurrent distribution using polymer two-phase systems. The chloroplast particles of the three populations differ in protein/chlorophyll ratio, ultrastructure and metabolism. One population, peak I, consists of intact chloropl...

journal_title：Molecular and cellular biochemistry

authors： Albertsson PA,Larsson C

更新日期：1976-06-15 00:00:00

abstract：:Hydrocortisone hemisuccinate within 4 hours after in vivo administration produced an increase in precursor incoporation into rat thymus RNA and proteins in the whole animal. From these results, together with information obtained from measurements of the tyrosine aminotransferase activity and the action of mitomycin C ...

journal_title：Molecular and cellular biochemistry

authors： Abraham AD

更新日期：1975-12-31 00:00:00

abstract：:When cells of the thymus or mouse leukemias P288 and L1210 are exposed in vitro to the potent synthetic glucocorticoid, 3H-Triamcinolone acetonide, the steroid enters the cells passively and binds to macromolecules in the cytoplasm. At 37 degrees C this hormone-receptor complex enters the nucleus and associates with t...

journal_title：Molecular and cellular biochemistry

authors： Turnell RW,Burton AF

更新日期：1975-12-31 00:00:00

abstract：:Basal and trypsin-stimulated adenosine triphosphatase activities of Escherichia coli K 12 have been characterized at pH 7.5 in the membrane-bound state and in a soluble form of the enzyme. The saturation curve for Mg2+/ATP = 1/2 was hyperbolic with the membrane-bound enzyme and sigmoidal with the soluble enzyme. Tryps...

journal_title：Molecular and cellular biochemistry

authors： Carreira J,Muñoz E

更新日期：1975-11-14 00:00:00

abstract：:The RNase hydrolysis of random-coil (alkaline form) poly A follows biphasic kinetics at low salt concentrations. However, its resistance to RNase increases with the ionic strength. Helical (acidic form) poly A is alos susceptible to RNase but its hydrolysis follows first-order kinetics, and its resistance increases as...

journal_title：Molecular and cellular biochemistry

authors： Iqbal ZM

更新日期：1975-10-31 00:00:00

abstract：:The energy metabolism of rat thymus cells has been investigated using preparations of isolated cells obtained by mechanical treatment of whole organs. The addition of glycolytic substrates such as glucose, pyruvate and lactate stimulates the endogenous respiration of these cells by 50%. On the other hand, succinate, g...

journal_title：Molecular and cellular biochemistry

authors： Cittadini A,Bossi D,Longhi G,Terranova T

更新日期：1975-07-31 00:00:00

abstract：:The uptake of glucose and gluconate is under inductive control in Pseudomonas putida. Glucose, gluconate, and 2-ketogluconate were each good nutritional inducers of these transport abilities. Glucose and gluconate uptake obeyed saturation kinetics: the apparent Km for glucose was 6 mM and that for gluconate was 0.5 mM...

journal_title：Molecular and cellular biochemistry

authors： Vicente M,Pedro MA,Torrontegui G,Cánovas JL

更新日期：1975-04-30 00:00:00

abstract：:A simple method is described for the isolation of crystalline pyruvate kinase from human skeletal muscle. The enzyme was purified by ammonium sulfate fractionation, heat treatment and crystallization. Two crystal forms of pyruvate kinase differing in solubility but not in specific activity were found. The homogenous e...

journal_title：Molecular and cellular biochemistry

authors： Baranowska B,Baranowski T

更新日期：1975-03-27 00:00:00

abstract：:We have observed that phospholipids and protein of the catecholamine (CA) storage granules, i.e. the chromaffin granules, interact in an in vitro system to form liposomal particles, which in many respects resemble the intact matrix of the bovine chromaffin granule. A model has been suggested which consists of an aqueo...

journal_title：Molecular and cellular biochemistry

authors： Helle KB,Serck-Hanssen G

更新日期：1975-02-28 00:00:00

abstract：:1. Glucokinase is one of four glucose phosphorylating enzymes present in rat liver. Its distinctive features are a high K-m for glucose (high-K-m isozyme) and a rather narrow substrate specificity. In contrast, the other three enzymes, collectively called hexokinases or low-K-m isozymes, exhibit low K-m values for glu...

journal_title：Molecular and cellular biochemistry

authors： Niemeyer H,Ureta T,Clark-Turri L

更新日期：1975-02-28 00:00:00