Cystein
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. Homocisteina : desenvolvimento de um novo metodo de analise utilizando o sistema DIMP/T&R-MIMS
This research work describes a new method for the identification and quantitative determination of homocysteine in plasm, an intermediate of the cystein synthesis, which is generated from methionine in the organism. This new method uses the Mass Spectrometry by Introduction via Membrane (MIMS). A membrane probe DIMP (Direct Introduction Membrane Probe) and t
Publicado em: 2001
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14. Immune response of the cattle tick Boophilus microplus: investigation of reactive oxygen species production by hemocytes. / Resposta imune do carrapato bovino Boophilus microplus: investigação da produção de espécies reativas de oxigênio pelos hemócitos.
The phagocytic activity and the reactive oxygen species (ROS) production during immune response of some hemocytes of the cattle tick Boophilus microplus were evaluated in this study. The ROS production was evaluated by luminol amplified luminescence, phenol red oxidation, dyhydrorhodamine (DHR) fluorescence microscopy and fluorimetry. The luminol-amplified l
Publicado em: 2000
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15. Identificação e caracterizaçã0 de frações alergenicas de baixo peso molecular do acaro Aleuroglyphus ovatus
Clinical reports have suggested an unusual frequency in skin prik test of atopic patients using Aleuroglyphus ovatus (Ao) a storage mite as allergen. To evaluate the most important Ao antigenic fractions we submitted the Ao to different conditions of extractions. Three extractiors solutions were investigated, ammonium acid carbonate, phosphate buffer saline
Publicado em: 1998
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16. The influence of N-acetyl-L-cystein infusion on cytokine levels and gastric intramucosal pH during severe sepsis
BioMed Central.
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17. Utilization of L-cystine by the gamma-glutamyl transpeptidase-gamma-glutamyl cyclotransferase pathway.
Cystine is a good acceptor of the gamma-glutamyl group of gamma-glutamyl donors in the reaction catalyzed by gamma-glutamyl transpeptidase. The product of the enzymatic reaction and an authentic sample of gamma-glutamylcystine were shown to exhibit identical chromatographic and electrophoretic behaviors; acid hydrolysis gave equimolar amounts of cystine and
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18. A structural approach to the role of CCN (CYR61/CTGF/NOV) proteins in tumourigenesis
The CCN (CYR61 [Cystein-rich61]/CTGF [connective tissue growth factor]/NOV [Nephroblastoma overexpressed]) proteins constitute a family of regulatory factors involved in many aspects of cell proliferation and differentiation. An increasing body of evidence indicates that abnormal expression of the CCN proteins is associated to tumourgenesis. The multimodular
BioMed Central.
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19. CCN3 and calcium signaling
The CCN family of genes consists presently of six members in human (CCN1-6) also known as Cyr61 (Cystein rich 61), CTGF (Connective Tissue Growth Factor), NOV (Nephroblastoma Overexpressed gene), WISP-1, 2 and 3 (Wnt-1 Induced Secreted Proteins). Results obtained over the past decade have indicated that CCN proteins are matricellular proteins, which are invo
BioMed Central.
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20. Unusual features of the retroid element PAT from the nematode Panagrellus redivivus.
The PAT retroid transposable elements differ from other retroids in that they have a 'split direct repeat' structure, i.e., and internal 300bp sequence is found repeated, about one half at each element extremity. A very abundant transcript of about 900 nt, the start of which maps to the preferentially deleted portion of PAT elements, is detected on total Pan
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21. Requirement of protein co-factor for the DNA-binding function of the human ski proto-oncogene product.
We identified the human c-ski gene product (c-Ski) as a protein with the apparent molecular weight of 100,000, p100c-ski, by using a c-Ski-specific polyclonal antibody. p100c-ski was a nuclear protein and p100c-ski in nuclear extracts of Molt4 cells bound to calf thymus DNA cellulose, but the bacterially synthesized c-Ski did not, suggesting that Ski was ass
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22. Lipoprotein nature of the colicin A lysis protein: effect of amino acid substitutions at the site of modification and processing.
The colicin A lysis protein (Cal) is required for the release of colicin A to the medium by producing bacteria. This protein is produced in a precursor form that contains a cysteine at the cleavage site (-Leu-Ala-Ala-Cys). The precursor must be modified by the addition of lipid before it can be processed. The maturation is prevented by globomycin, an inhibit
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23. DNA-processing activities associated with the purified alpha, beta 2, and alpha beta molecular forms of avian sarcoma virus RNA-dependent DNA polymerase.
The RNA-dependent DNA polymerase purified from B77 avian sarcoma virus exhibited two distinct DNA-processing activities. The alpha and beta 2 isoenzymes possessed an endodeoxyribonuclease activity capable of nicking simian virus 40 superhelical DNA, whereas the alpha beta isoenzyme performed as an untwisting topoisomerase. Both activities associated with the
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24. Identification of proteases employed by dendritic cells in the processing of protein purified derivative (PPD)
Dendritic cells (DC) are known to present exogenous protein Ag effectively to T cells. In this study we sought to identify the proteases that DC employ during antigen processing. The murine epidermal-derived DC line Xs52, when pulsed with PPD, optimally activated the PPD-reactive Th1 clone LNC.2F1 as well as the Th2 clone LNC.4k1, and this activation was com
BioMed Central.