Kinetics of Beef Heart Glutamic-Alanine Transaminase
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Kinetics of Beef Heart Glutamic-alanine Transaminase.
It has now been clearly established that pyridoxal phosphate serves as the coenayme of many transaminases. Several lines of evidence have indicated that the coenzyme acts alternately as acceptor and donar of amino groups, shuttling between the aldehydic (pyridoxal phosphate) and amino (pyridoxamine phosphate) forms (2-11). However, a detailed study of the kinetics of the transaminase reaction w...
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Among the mechanisms which have been considered as possible descriptions of the molecular events underlying hormone action, one which has attracted increasing attention among contemporary biochemists is the proposal that control of the biosynthesis of specific enzymes may be an important factor (see, e.g., ref. 1). The plethora of enzyme activities which are found to increase or decrease in res...
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‘THE RECENT DEVELOPMENT of a new colorimetric procedure (TransAc*), for the determination of serum glutamic oxalacetic transaminase utilizing the diazonium salt, 6-benzamido-4-methoxy-m-toluidine diazonium chloride, as the color developer with a specificity for oxalacetic acid, prompted the following experiments. Determination of glutamic oxalacetic transaminase activities were performed accord...
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Pig heart “soluble” glutamic-aspartic transaminase (L-aspartate : 2-oxoglutarate aminotransferase, EC 2.6.1.1) will catalyze the exchange of an amino group between glutamate and ketoglutarate without the participation of any other amino acid or keto acid (1). This “exchange transamination” also occurs between aspartate and oxaloacetate. The rates of these reactions are comparable to the physiol...
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24 Rumberg, B., A. Muller, and H. T. Witt, Nature, 194, 854 (1962). 25 Duysens, L. M. N., and J. Amesz, Biochim. et Biophys. Acta, 64, 261 (1962). 26 Crane, F. L., in CIBA Foundation Symposium on Quinones in Electron Transport (London, 1960), ed. C. E. W. Wolstenholme and C. K. O'Connor (London: J. & A. Churchill, Ltd., 1961), p. 36. 27 Clayton, R. K., Biochem. Biophys. Res. Comm., 9, 49 (1962)...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1965
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)97216-9