abstract：:Magnesium ions variably influenced activity of highly purified thymidylate synthetase preparations from different mouse tumors, activating the enzyme from Ehrlich ascites carcinoma (EAC) cells and inhibiting the enzyme from L1210 and L5178Y cells and from 5-fluorodeoxyuridine (FdUrd)-resistant EAC cells. In the presen...

journal_title：Molecular and cellular biochemistry

authors： Rode W,Jastreboff MM

更新日期：1984-01-01 00:00:00

abstract：:delta-Crystallin is a major structural protein of avian and reptilian lenses that is absent from the lenses of fish, amphibia and mammals. It appears to be a tetrameric protein with a native molecular weight near 200 000 (200K) and polypeptide molecular weight near 50K and 48K) (see Note added in proof). The alpha-cry...

journal_title：Molecular and cellular biochemistry

authors： Piatigorsky J

更新日期：1984-01-01 00:00:00

abstract：:Proteins which are major substrates of epidermal transglutaminases can be identified in cultured keratinocytes of human, cow, and new-born rat. Cow and human keratinocytes both contain substrate proteins which are 30 000 to 50 000 daltons in size but dissociable in SDS to 12 000 daltons or less. In both species these ...

journal_title：Molecular and cellular biochemistry

authors： Kubilus J,Baden HP

更新日期：1984-01-01 00:00:00

abstract：:Adenosine diphosphate (ADP) is known to induce platelet shape change, aggregation and fibrinogen binding, followed by secretion. These processes are mediated by the binding of ADP to an externally oriented protein of the platelet plasma membrane. An affinity analog of ATP, a competitive inhibitor of the action of ADP,...

journal_title：Molecular and cellular biochemistry

authors： Colman RW,Figures WR

更新日期：1984-01-01 00:00:00

abstract：:Oligomycin, an inhibitor of ATP synthesis, has been used as a model to study the effects of ATP depletion on macromolecular synthesis and modification of membrane permeability. Protein synthesis is totally blocked by the antibiotic, whereas RNA and DNA synthesis are less inhibited. Different concentrations of monovale...

journal_title：Molecular and cellular biochemistry

authors： Otero MJ,Carrasco L

更新日期：1984-01-01 00:00:00

abstract：:Thialysine cannot completely substitute lysine as growth factor for a lysine-requiring E. coli mutant. However it can be utilized for growth in the presence of limiting amounts of lysine, in substitution of, and in competition with this latter. The effects of thialysine on growth rate, protein synthesis rate and cell ...

journal_title：Molecular and cellular biochemistry

authors： Cinia C,Busiello V,Coccia R,Di Girolamo M,de Marco C

更新日期：1984-01-01 00:00:00

abstract：:The effects of Mg2+ and Ca2+ deprivation on survival and growth of normal and transformed cultured cells were studied. Normal fibroblast from several origins (mouse, hamster and human) did not grow in 2 microM Mg2+ medium, whereas transformed fibroblasts (mouse and rat) and tumor cells of other types (mouse adrenocort...

journal_title：Molecular and cellular biochemistry

authors： Ribeiro SM,Armelin HA

更新日期：1984-01-01 00:00:00

abstract：:The application of nucleic acid hybridization techniques to the study of liver regeneration has led to a revision of some well-established ideas about the patterns of gene expression during regenerative growth. This paper focuses on two broad problems: a) the extent to which mRNA populations in regenerating liver diff...

journal_title：Molecular and cellular biochemistry

authors： Fausto N

更新日期：1984-01-01 00:00:00

abstract：:NADPH oxidase from stimulated guinea pig granulocytes was extracted with deoxycholate. The solubilized enzyme was stable in 20% glycerol. Solubilized enzyme was free of myeloperoxidase activity. The properties of the deoxycholate solubilized enzyme indicated that it is a high molecular weight complex with a flavoprote...

journal_title：Molecular and cellular biochemistry

authors： Bellavite P,Serra MC,Davoli A,Bannister JV,Rossi F

更新日期：1983-01-01 00:00:00

abstract：:Rat thymocytes, spleen lymphocytes and isolated nuclei were incubated with fatty acids and then labelled with 5-doxylstearic acid and 12-doxylstearic acid. The ESR spectra only in the case of 5-doxylstearic acid showed changes which were demonstrable only under those conditions which resulted in cytolysis. Thymocytes ...

journal_title：Molecular and cellular biochemistry

authors： Burton AF,Piette LH

更新日期：1983-01-01 00:00:00

abstract：:The optical properties, copper content, catalytic activity and quaternary structure of many preparations of ascorbate oxidase purified with two different methods were examined. Fresh samples appeared identical and were characterized by optical ratios A280/A610 = 25 +/- 1 and A330/A610 = 0.8 +/- 0.05, by specific activ...

journal_title：Molecular and cellular biochemistry

authors： Avigliano L,Vecchini P,Sirianni P,Marcozzi G,Marchesini A,Mondovi B

更新日期：1983-01-01 00:00:00

abstract：:The tRNA modifying enzyme, S-adenosylmethionine:tRNA(guanine-7-)-methyltransferase, has been extensively purified from Salmonella typhimurium. A rapid and efficient purification method using phosphocellulose chromatography followed by ammonium sulfate precipitation and Sephadex G-100 gel filtration is described. The e...

journal_title：Molecular and cellular biochemistry

authors： Colonna A,Ciliberto G,Santamaria R,Cimino F,Salvatore F

更新日期：1983-01-01 00:00:00

abstract：:Differentiation of 3T3-L1 preadipocytes, induced by methyl-isobutylxanthine (MIX), dexamethasone (DEX), and insulin, results in cells with the morphological and biochemical characteristics of adipocytes. Following incubation of 3T3-L1 cells with MIX, DEX, and insulin, poly(ADP-ribose) synthetase activity decreased abr...

journal_title：Molecular and cellular biochemistry

authors： Pekala PH,Moss J

更新日期：1983-01-01 00:00:00

abstract：:An arginase isolated from a capsulated Bacillus anthracis strain was highly purified and crystallized. The chemical and immunological characteristics of this enzyme re described. Some very important properties differ from those of another bacterial arginase, i.e. Staphylococcus aureus arginase, described in a previous...

journal_title：Molecular and cellular biochemistry

authors： Soru E

更新日期：1983-01-01 00:00:00

abstract：:Pre-steady-state and steady-state kinetics for the p.p. elastase-catalysed hydrolysis of ZAlaONp, one of the most favourable substrates for this serine protease, have been studied between pH 4.0 and 8.0. The results are consistent with the minimum three-step mechanism: (formula; see text) Under pre-steady-state condit...

journal_title：Molecular and cellular biochemistry

authors： Ascenzi P,Menegatti E,Guarneri M,Antonini E

更新日期：1983-01-01 00:00:00

abstract：:Albumin complementary DNA (cDNA) was transcribed from purified albumin mRNA from the liver of Xenopus laevis. The resultant cDNA was an almost full length copy as defined by denaturing gel electrophoresis; was hybridized specifically to albumin mRNA with pseudo-first-order reaction kinetics and the mRNA . cDNA hybrid ...

journal_title：Molecular and cellular biochemistry

authors： Dimitriadis GJ,Zongza-Dimitriadis V

更新日期：1983-01-01 00:00:00

abstract：:Pig intestinal brush borders (BB) were radiolabeled by iodination using the lactoperoxidase-hydrogen peroxide procedure. The BB were then detergent solubilized, centrifuged to remove particulate material, and chromatographed on Sepharose CL-4B. The fractions were incubated with K88+ E. coli using an in vitro binding a...

journal_title：Molecular and cellular biochemistry

authors： Staley TE,Wilson IB

更新日期：1983-01-01 00:00:00

abstract：:In this paper we review our experiments on the light-induced Ca2+ release and proton uptake at the rod outer segment (ROS) disk membrane using flash-spectrophotometry and the indicating dyes arsenazo III and bromcresol purple. We used three different ROS preparations in order to locate the intracellular site of Ca2+ r...

journal_title：Molecular and cellular biochemistry

authors： Schnetkamp PP,Kaupp UB

更新日期：1983-01-01 00:00:00

abstract：:The possibility of amino acids biosynthesis from sucrose, metabolites of Krebs cycle or glyoxylate and ammonium by intact bacteroids has been studied. The suspension of intact Rhizobium lupini bacteroids in phosphate buffer solution pH 7.8 was shown to catalyse the biosynthesis from sucrose and ammonium of some amino ...

journal_title：Molecular and cellular biochemistry

authors： Kretovich WL,Kariakina TI,Kazakova OV,Sidelnikova LI,Kaloshina GS,Shaposhnikov GL

更新日期：1983-01-01 00:00:00

abstract：:Tyrosine hydroxylase is considered to be the rate-limiting enzyme in the synthesis of catecholamines in both the central and peripheral nervous system. Increased or decreased neuronal activity, stress, lesions, drug effects, endocrinological manipulations and experimental models of hypertension are associated with alt...

journal_title：Molecular and cellular biochemistry

authors： Masserano JM,Weiner N

更新日期：1983-01-01 00:00:00

abstract：:The effects of transcription and translation inhibitors on NADP-glutamate dehydrogenase and glutamine synthetase synthesis in nitrogen-starving Ankistrodesmus braunii cells have been studied. Considering the results obtained one can suggest that both enzymes are coded in a chloroplast genome and that during nitrogen s...

journal_title：Molecular and cellular biochemistry

authors： Shatilov VR,Sof'in AV,Zabrodina TM,Kretovich WL

更新日期：1982-09-03 00:00:00

abstract：:Xanthine oxidase was purified from bovine milk-fat globule membrane by extraction with butan-1-ol, precipitation with ammonium sulphate, separation by preparative electrofocusing and chromatography on Concanavalin-A/Agarose. The enzyme had an A280/A450 ratio of 4.8 and a specific activity of 3.09. At least five to sev...

journal_title：Molecular and cellular biochemistry

authors： Sullivan CH,Mather IH,Greenwalt DE,Madara PJ

更新日期：1982-04-16 00:00:00

abstract：:Enzymes have proven to be sensitive and versatile labels for immunochemical assays. The sensitivity of an enzyme label stems from its extraordinary catalytic power which in turn provides a great amplification of signals. Its versatility, however, stems from the fact that enzyme activity can be modulated by a number of...

journal_title：Molecular and cellular biochemistry

authors： Ngo TT,Lenhoff HM

更新日期：1982-04-16 00:00:00

abstract：:A noncholinergic nicotine receptor on human phagocytic leukocytes has been characterized using the binding of 3H-(d,1)-nicotine. The average affinity +/- standard deviation of (d,1)-nicotine for the receptor on neutrophils is 36 +/- 18 nM (n = 6). The binding is saturable with an average of 8.7 x 10(4) sites per neutr...

journal_title：Molecular and cellular biochemistry

authors： Davies BD,Hoss W,Lin JP,Lionetti F

更新日期：1982-04-16 00:00:00

abstract：:This review examines the mechanism of translocation of cytoplasmically synthesized proteins into mitochondria. Approximately 10% of the mitochondrial proteins are synthesized within the organelles while most mitochondrial proteins are coded for by nuclear genes and synthesized on cytoplasmic ribosomes. Those mitochond...

journal_title：Molecular and cellular biochemistry

authors： Ades IZ

更新日期：1982-03-19 00:00:00

abstract：:Physiological, pharmacological, histochemical and biochemical studies indicate that dopamine receptors are heterogenous in the central nervous system with each individual functions. This review describes pharmacological and biochemical characteristics of dopamine receptors, particularly in canine caudate nucleus, whic...

journal_title：Molecular and cellular biochemistry

authors： Maeno H

更新日期：1982-03-19 00:00:00

abstract：:Phosphorylases (EC 2.4.1.1) from potato and rabbit muscle are similar in many of their structural and kinetic properties, despite differences in regulation of their enzyme activity. Rabbit muscle phosphorylase is subject to both allosteric and covalent controls, while potato phosphorylase is an active species without ...

journal_title：Molecular and cellular biochemistry

authors： Fukui T,Shimomura S,Nakano K

更新日期：1982-02-19 00:00:00

abstract：:In this article, we discuss our attempts to establish the existence in the cytoplasm of regulatory molecules involved in translational control. Our studies have revealed the presence of cAMP independent protein kinase in the free mRNP complex capable of phosphorylating a Mr = 38 000 polypeptide, also part of the same ...

journal_title：Molecular and cellular biochemistry

authors： Bag J,Sells BH

更新日期：1981-11-13 00:00:00

abstract：:Surfactants, which provide a hydrophobic environment, may induce an ordered conformation in polypeptides and proteins that contain a sequence with helix-or beta-forming potential. This hypothesis has been illustrated in circular dichroic studies of oligopeptides and short polypeptides. These peptide-surfactant complex...

journal_title：Molecular and cellular biochemistry

authors： Wu CS,Yang JT

更新日期：1981-10-30 00:00:00

abstract：:Several metabolic compounds have been found to be competitive inhibitors of the anomerase activity of phosphoglucose isomerase (EC 5.3.1.9).Ki values for erythrose 4-phosphate, 6-phosphogluconate, and fructose 1,6-bisphosphate for the anomerase reaction are 0.32 muM, 21 muM, and 84 muM respectively at 0 degree and pH ...

journal_title：Molecular and cellular biochemistry

authors： Howell EE,Schray KJ

更新日期：1981-07-07 00:00:00

abstract：:Adipocytes from 26-week-old Zucker rats (greater than 600 g) and controls of the same strain and age (greater than 400 g) served as models of insulin resistance and obesity. Adipocytes from fatty rats demonstrated insulin resistance of glucose metabolism and resistance to the antilipolytic effect of insulin which was ...

journal_title：Molecular and cellular biochemistry

authors： Stevens J,Green MH,Kaiser DL,Pohl SL

更新日期：1981-07-01 00:00:00

abstract：:The purpose of this investigation was to determine whether fibronectin preparations from both chicken plasma and cell surface of fibroblasts can promote phagocytosis of gelatin-coated latex particles. Chicken plasma fibronectin was isolated (a) by ammonium sulfate fractionation, chromatography on Sepharose-4B followed...

journal_title：Molecular and cellular biochemistry

authors： Marquette D,Molnar J,Yamada K,Schlesinger D,Darby S,Van Alten P

更新日期：1981-05-26 00:00:00

abstract：:The bioenergetics of Ca2+ transport in bacteria are discussed with special emphasis on the interrelationship between transport and other cellular functions such as substrate oxidation by the respiratory chain and oxidative phosphorylation. The unusual polarity of Ca2+ movement provides an exceptional tool to compare a...

journal_title：Molecular and cellular biochemistry

authors： Devés R,Brodie AF

更新日期：1981-04-27 00:00:00

abstract：:E. coli ribosomal protein L12, because of its unique features, has been studied in more detail than perhaps any of the other ribosomal proteins. Unlike the other ribosomal proteins that are generally present in stoichiometric amounts, there are four copies of L12 per ribosome, some of which are acetylated on the N-ter...

journal_title：Molecular and cellular biochemistry

authors： Brot N,Weissbach H

更新日期：1981-04-13 00:00:00

abstract：:The occurrence of the 'whey' protein, alpha-lactalbumin, in pig (Sus scrofus) milk samples from 904 sows is examined. A semi-discontinuous buffer system has been developed to detect the existence of genetic polymorphism. There are two homozygous variants, designated A and B. Both variants are isolated and it is shown ...

journal_title：Molecular and cellular biochemistry

authors： Bell K,McKenzie HA,Shaw DC

更新日期：1981-03-13 00:00:00

abstract：:Under normal environmental conditions, L-glutamine is well oxidized but fails to stimulate insulin release in rat pancreatic islets. However, a marked stimulation of insulin release by L-glutamine, without alteration in its oxidation rate occurs when the intracellular pH of the islet cells is decreased and/or when the...

journal_title：Molecular and cellular biochemistry

authors： Sener A,Malaisse WJ

更新日期：1980-12-16 00:00:00

abstract：:Somatostatin has been shown to inhibit the release of various polypeptide hormones including insulin, glucagon, gastrin, thyroid stimulating hormone, and growth hormone. The mechanism by which somatostatin inhibits the release of these various polypeptide hormones has not been fully elucidated. It has been reported th...

journal_title：Molecular and cellular biochemistry

authors： Vesely DL

更新日期：1980-11-20 00:00:00

abstract：:High molecular weight, fully double-stranded RNA (dsRNA) has been recognized as the genetic material of many plant, animal, fungal, and bacterial viruses (Diplornaviruses): virusspecific dsRNA is also found in cells infected with single-stranded RNA viruses. DsRNA has identified in a variety of apparently normal eucar...

journal_title：Molecular and cellular biochemistry

authors： Libonati M,Carsana A,Furia A

更新日期：1980-08-16 00:00:00

abstract：:The size distribution of lysosomes was determined in kidney proximal tubule cells of two mouse pigment mutants, pale ear and pallid, which have an increase in kidney lysosomal enzyme content caused by a decreased rate of secretion of lysosomal enzymes into urine. Both mutations have larger lysosomes when compared with...

journal_title：Molecular and cellular biochemistry

authors： Piccini AE,Jahreis GP,Novak EK,Swank RT

更新日期：1980-06-18 00:00:00

abstract：:Comparison of Ca2+ uptake by isolated mouse liver mitochondria, and mitochondria prepared from mastocytoma cells grown with and without N6,O2'-dibutyryladenosine 3',5' cyclic monophosphate (DB cyclic AMP) and theophylline showed several differences in their capacity to take up and retain calcium. In particular mitocho...

journal_title：Molecular and cellular biochemistry

authors： McHardy JE,Ralph RK

更新日期：1980-03-20 00:00:00