Biomaterial Database

[Cytochemical research on cysts of the sarcosporidian Sarcocystis bovicanis. II. Oxidation-reduction enzymes]. 1988

A L Metsis

By the means of light-microscopic cytological enzymatic methods, the presence of several enzymes (NAD.H and NADP.H-tetrazolium reductases, in addition to alcohol, succinate, isocitrate, glucose-6-phosphate, beta-hydroxybutyrate and glutamate dehydrogenases) has been studied in the tissue cysts of S. bovicanis. A mixed character of oxidative metabolism in the cyst stages is suggested, the involvement of gluconeogenesis being proposed. Neither beta-hydroxybutyrate nor alcohol dehydrogenase activity was demonstrated indicating the absence or a very low rate of lipid metabolism, and suggesting that the process of glycolysis may end with malate formation. From the low activity level of succinate dehydrogenases it is concluded that the citric acid cycle plays presumably a secondary role, if at all, in the energy supply of the cyst stages. Also, a low activity of glucose-6-phosphate dehydrogenases is pointed out. Thus, it is proposed that glycolysis may be primary, if not the only, oxidative pathway in the cyst stages.

UI	MeSH Term	Description	Entries
D009246	NADH Tetrazolium Reductase	Catalyzes the reduction of tetrazolium compounds in the presence of NADH.	NAD(P)H Nitroblue Tetrazolium Reductase,NADH2 Tetrazolium Reductase,Reductase, NADH Tetrazolium,Reductase, NADH2 Tetrazolium,Tetrazolium Reductase, NADH,Tetrazolium Reductase, NADH2
D010084	Oxidation-Reduction	A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).	Redox,Oxidation Reduction
D010088	Oxidoreductases	The class of all enzymes catalyzing oxidoreduction reactions. The substrate that is oxidized is regarded as a hydrogen donor. The systematic name is based on donor:acceptor oxidoreductase. The recommended name will be dehydrogenase, wherever this is possible; as an alternative, reductase can be used. Oxidase is only used in cases where O2 is the acceptor. (Enzyme Nomenclature, 1992, p9)	Dehydrogenases,Oxidases,Oxidoreductase,Reductases,Dehydrogenase,Oxidase,Reductase
D010427	Pentose Phosphate Pathway	An oxidative decarboxylation process that converts GLUCOSE-6-PHOSPHATE to D-ribose-5-phosphate via 6-phosphogluconate. The pentose product is used in the biosynthesis of NUCLEIC ACIDS. The generated energy is stored in the form of NADPH. This pathway is prominent in tissues which are active in the synthesis of FATTY ACIDS and STEROIDS.	Hexose Monophosphate Shunt,Pentose Phosphate Shunt,Pentose Shunt,Pentosephosphate Pathway,Pentose-Phosphate Pathway,Pentosephosphate Shunt,Hexose Monophosphate Shunts,Pathway, Pentose Phosphate,Pathway, Pentose-Phosphate,Pathway, Pentosephosphate,Pathways, Pentose Phosphate,Pathways, Pentose-Phosphate,Pathways, Pentosephosphate,Pentose Phosphate Pathways,Pentose Phosphate Shunts,Pentose Shunts,Pentose-Phosphate Pathways,Pentosephosphate Pathways,Pentosephosphate Shunts,Shunt, Hexose Monophosphate,Shunt, Pentose,Shunt, Pentose Phosphate,Shunt, Pentosephosphate,Shunts, Hexose Monophosphate,Shunts, Pentose,Shunts, Pentose Phosphate,Shunts, Pentosephosphate
D002417	Cattle	Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor.	Beef Cow,Bos grunniens,Bos indicus,Bos indicus Cattle,Bos taurus,Cow,Cow, Domestic,Dairy Cow,Holstein Cow,Indicine Cattle,Taurine Cattle,Taurus Cattle,Yak,Zebu,Beef Cows,Bos indicus Cattles,Cattle, Bos indicus,Cattle, Indicine,Cattle, Taurine,Cattle, Taurus,Cattles, Bos indicus,Cattles, Indicine,Cattles, Taurine,Cattles, Taurus,Cow, Beef,Cow, Dairy,Cow, Holstein,Cows,Dairy Cows,Domestic Cow,Domestic Cows,Indicine Cattles,Taurine Cattles,Taurus Cattles,Yaks,Zebus
D002952	Citric Acid Cycle	A series of oxidative reactions in the breakdown of acetyl units derived from GLUCOSE; FATTY ACIDS; or AMINO ACIDS by means of tricarboxylic acid intermediates. The end products are CARBON DIOXIDE, water, and energy in the form of phosphate bonds.	Krebs Cycle,Tricarboxylic Acid Cycle,Citric Acid Cycles,Cycle, Citric Acid,Cycle, Krebs,Cycle, Tricarboxylic Acid,Cycles, Citric Acid,Cycles, Tricarboxylic Acid,Tricarboxylic Acid Cycles
D006019	Glycolysis	A metabolic process that converts GLUCOSE into two molecules of PYRUVIC ACID through a series of enzymatic reactions. Energy generated by this process is conserved in two molecules of ATP. Glycolysis is the universal catabolic pathway for glucose, free glucose, or glucose derived from complex CARBOHYDRATES, such as GLYCOGEN and STARCH.	Embden-Meyerhof Pathway,Embden-Meyerhof-Parnas Pathway,Embden Meyerhof Parnas Pathway,Embden Meyerhof Pathway,Embden-Meyerhof Pathways,Pathway, Embden-Meyerhof,Pathway, Embden-Meyerhof-Parnas,Pathways, Embden-Meyerhof
D006321	Heart	The hollow, muscular organ that maintains the circulation of the blood.	Hearts
D006651	Histocytochemistry	Study of intracellular distribution of chemicals, reaction sites, enzymes, etc., by means of staining reactions, radioactive isotope uptake, selective metal distribution in electron microscopy, or other methods.	Cytochemistry
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia