The choice of conditions for cathepsin D activity determination in human saliva. 2006

W Roszkowska-Jakimiec, and E Dabrowska, and M Gacko, and A Karwowska, and M Chlabicz
Department of Instrumental Analysis, Medical University of BiaƂystok, Poland. analist@amb.edu.pl

The aim of the study was the demonstration and choice of conditions for the determination of cathepsin D activity in human mixed saliva. The 6% solution of hemoglobin, denatured with hydrochloric acid, was used as the substrate. The ratio of saliva volume to hemoglobin was 4:1 w/v. The reaction was interrupted by adding 10% trichloroacetic acid, after 6 hours of incubation at 37 degrees C. The increase in degradation products was determined with the use of Folina and Ciocalteau method with copper modification.

UI MeSH Term Description Entries
D008982 Molybdenum A metallic element with the atomic symbol Mo, atomic number 42, and atomic weight 95.95. It is an essential trace element, being a component of the enzymes xanthine oxidase, aldehyde oxidase, and nitrate reductase. Molybdenum-98,Molybdenum 98
D002402 Cathepsin D An intracellular proteinase found in a variety of tissue. It has specificity similar to but narrower than that of pepsin A. The enzyme is involved in catabolism of cartilage and connective tissue. EC 3.4.23.5. (Formerly EC 3.4.4.23).
D004796 Clinical Enzyme Tests Analyses for a specific enzyme activity, or of the level of a specific enzyme that is used to assess health and disease risk, for early detection of disease or disease prediction, diagnosis, and change in disease status. Enzyme Tests, Clinical,Clinical Enzyme Test,Enzyme Test, Clinical,Test, Clinical Enzyme,Tests, Clinical Enzyme
D006454 Hemoglobins The oxygen-carrying proteins of ERYTHROCYTES. They are found in all vertebrates and some invertebrates. The number of globin subunits in the hemoglobin quaternary structure differs between species. Structures range from monomeric to a variety of multimeric arrangements. Eryhem,Ferrous Hemoglobin,Hemoglobin,Hemoglobin, Ferrous
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006851 Hydrochloric Acid A strong corrosive acid that is commonly used as a laboratory reagent. It is formed by dissolving hydrogen chloride in water. GASTRIC ACID is the hydrochloric acid component of GASTRIC JUICE. Hydrogen Chloride,Muriatic Acid,Acid, Hydrochloric,Acid, Muriatic,Chloride, Hydrogen
D012463 Saliva The clear, viscous fluid secreted by the SALIVARY GLANDS and mucous glands of the mouth. It contains MUCINS, water, organic salts, and ptylin. Salivas
D014238 Trichloroacetic Acid A strong acid used as a protein precipitant in clinical chemistry and also as a caustic for removing warts. Acide trichloracetique,Rubidium Trichloroacetate,Sodium Trichloroacetate,Acid, Trichloroacetic,Trichloroacetate, Rubidium,Trichloroacetate, Sodium,trichloracetique, Acide
D017973 Tungsten Compounds Inorganic compounds that contain tungsten as an integral part of the molecule. Compounds, Tungsten

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