(1) dl-Methionine stimulated the synthesis of cephalosporins when added after the growth phase.
(2) We recently demonstrated that functional change in SSI was possible simply by replacing the amino acid residue at the reactive P1 site (methionine 73) of SSI.
(3) It could be demonstrated by radioimmune precipitation of virus labeled with[35S]methionine that all three polypeptides are specific for hog cholera virions.
(4) Histone mRNA, labeled with 32P or 3H-methionine during the S phase of partially synchronized HeLa cells, was isolated from the polyribosomes and purified as a "9S" component by sucrose gradient sedimentation.
(5) S-methyl-l-cysteine, 2-hydroxy-4-methiol butyric acid, S-adenosyl-l-methionine, and methionine peptides were the only compounds supporting growth, when substituted for methionine.
(6) The effects of hyperammonemia on brain function have been studied in three different experimental models in the rat: acute liver ischemia, urease-treated animals and methionine sulfoximine-treated animals.
(7) No methionine-enkephalin-positive nerves could be detected in the common bile duct, pancreatic duct or gallbladder.
(8) The present in vitro studies show that it is found as beta-endorphin in bovine pituitary slices incubated with radioactive amino acid precursor [35S]methionine.
(9) The effect of modifying the periodate-susceptible methionine residues in chicken ovotransferrin was small but significant.
(10) In the present work, we measured the inactivation of methionine synthase and the concurrent homocysteine export rate of two murine and four human cell lines during nitrous oxide exposure.
(11) The linewidths of the methionine Cepsilon resonances are narrowed by increasing temperature according to an Arrhenius energy of activation of nearly 3 kcal.
(12) Arteriosclerotic plaques were found in the aorta and arteries of rabbits given homocysteine thiolactone, methionine or homocysteic acid, both parenterally and in a synthetic diet.
(13) The data indicate poor D-methionine utilization by postsurgical patients during total parenteral nutrition when given as DL-methionine in the presence of other amino acids and glucose.
(14) They correspond to the active fragment, amino acids 5-13, of the natural Mas-AT with substitution of norleucine for methionine.
(15) Metabolic labeling of the E. coli clones with [35S]methionine followed by radioimmunoprecipitation with monoclonal antibodies revealed that the 35S-labeled recombinant and 125I-labeled native (T. pallidum) forms of the antigen had identical electrophoretic mobilities.
(16) The data suggest that the concentration of methylfolate in rat livers is controlled by the concentrations of methionine.
(17) Aspartate levels and release from rat striatal slices following the inhibition of glutamine synthetase (GS) by methionine sulfoximine (MSO) were studied.
(18) A small number of CNSs was radiolabeled with a mixture of 14C-labeled amino acids or with [35S]methionine, and the pattern of labeled proteins was analyzed.
(19) In tissue cultures of normal adult and malignant mammalian cells, homocystine has been substituted for methionine in a medium rich in folic acid and cyanocobalamin.
(20) Immunoprecipitation of proteins with rabbit antifumarase antibody in (35S)-methionine-labeled fibroblasts indicated that a protein of correct size (Mr = 44,000 daltons) corresponding to fumarase was synthesized in similar amounts in both the patients and controls.
Sulphur
Definition:
(n.) A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast beds mixed with gypsum and various earthy materials, from which it is melted out. Symbol S. Atomic weight 32. The specific gravity of ordinary octohedral sulphur is 2.05; of prismatic sulphur, 1.96.
(n.) Any one of numerous species of yellow or orange butterflies of the subfamily Pierinae; as, the clouded sulphur (Eurymus, / Colias, philodice), which is the common yellow butterfly of the Eastern United States.
Example Sentences:
(1) That suggests they are being replenished by sulphur dioxide, most probably from volcanoes.
(2) Sulphuric acid fluorescence is used for quantitation and specificity is achieved by the addition of tritiated oestrone to the urine hydrolysate.
(3) Liver scintigraphy with 67-Ga citrate and alphafetoprotein (afp) determinations in the serum were carried out in 84 patients with liver mass lesions in the preceding sulphur colloid scans.
(4) The use of sulphur-containing amino acids and 2-deoxyglucose in growth media led to impaired cell wall synthesis and rendered cells very susceptible to treatment with mercapto-ethanol and various lytic enzymes.
(5) The molecular mass (5988 Da) of the native rubredoxin has been measured by electrospray-ionization m.s., thus establishing the applicability of the technique to this type of iron-sulphur protein.
(6) Attention is drawn to the shortcomings in our current knowledge of the scale of turnover of the sulphur cycle and of our understanding of the microorganisms involved in specialized environments.
(7) N-Methylformamide extracts of acid-treated precipitated VFe protein of the V-nitrogenase of Azotobacter chroococcum are yellow-brown in colour and contain vanadium, iron and acid-labile sulphur in the approximate proportions 1:6:5.
(8) Here we show that a farnesyl moiety is attached to a sulphur atom of the C-terminal cysteine of T gamma-2 (active form), a part of which is additionally methyl-esterified at the alpha-carboxyl group.
(9) Erabutoxin a was partially hydrolysed with enzymes and sulphuric acid and the resulting peptides were separated from each other by column chromatography and paper electrophoresis.
(10) NADH:ubiquinone reductase, the respiratory chain complex I of mitochondria, consists of some 25 nuclear-encoded and seven mitochondrially encoded subunits, and contains as redox groups one FMN, probably one internal ubiquinone and at least four iron-sulphur clusters.
(11) Bacteria of the genus Thiobacillus can obtain energy from the chemolithotrophic oxidation of inorganic sulphur and its compounds (sulphide, thiosulphate and polythionates) and use this energy to support autotrophic growth on carbon dioxide.
(12) Bacteriophage mu2 is inactivated by both mono- and di-functional sulphur mustards at relatively low extents of alkylation.
(13) The study of amino acid pattern shows that sulphur containing amino acids are limiting to almost the same degree in meat and meat soy blend.
(14) In a case in which ovarian biopsy at laparotomy revealed typical actinomycotic "sulphur granules" and Actinomyces israelii was diagnosed, standard Actinomyces israelii cytoplasmic antigens and circulating C1-binding immune complexes were found in the patient's serum when it was tested by counterimmunoelectrophoresis.
(15) Experiments were performed in a cylinder full of beads open at one end and closed at the other in which a mixture of oxygen with helium or argon or sulphur hexafluoride could diffuse with ambient air through the open end.
(16) The results obtained indicated that both the sulphydration and trans-sulphuration pathways were operating.
(17) This effect may add to other factors decreasing sulphur availability in critically ill patients, and simultaneous administration of thiosulphate is therefore recommended to ensure a safe SNP treatment during and after coronary bypass operations.
(18) (4) There is no specific therapy for poisoning by sulphur mustard.
(19) Among various acetylated proteins, proteins insoluble in 0.1m-sulphuric acid have the highest radioactivity.
(20) Desulfovibrio africanus ferredoxin III is a monomeric protein (Mr 6585) containing seven cysteine residues and 7-8 iron atoms and 6-8 atoms of acid-labile sulphur.