摘要:
A substrate or an enzymatic activity in a body fluid can be measured accurately without influences of interfering substances such as bilirubin by reacting an oxidase corresponding to an analyte with the analyte or an oxidase corresponding to a substance produced by enzymatic reaction with the substance in a measuring system containing one or more cationic and/or amphoteric surfactants, followed by optical measurement of hydrogen peroxide produced by the reaction.
摘要:
A substrate in a sample can be determined quantitatively by measuring colorimetrically superoxide ion generated by treating the sample with a specific oxidase corresponding to the substrate to be determined, said oxidase treatment and measuring of the generated superoxide ion being conducted by using a reagent composition comprising (a) an oxidase, (b) peroxidase, (c) a phenol and/or an amine, (d) a thiol compound, (e) a color producing reagent to be reduced, and if necessary (f) a chelating agent. Further, the peroxidase can be replaced by (b') iron complex of porphyrin or ion chelate of complexane.
摘要:
Disclosed is a hybrid enzyme containing a foreign peptide, the hybrid enzyme having an enzyme activity similar to that prior to the substitution or insertion of the peptide, and having a property that the hybrid enzyme activity is modulated or modified when a material having binding ability to the peptide introduced by substitution or insertion is bound to the peptide moiety. Using the hybrid enzyme, it becomes possible to assay a trace amount of CRP in a sample by a homogeneous colorimetry, and a macromolecule materials can be easily assayed in a homogeneous system.
摘要:
The present invention is to provide a method for measuring an amount of cholesterol in low density lipoproteins (LDL-cholesterol) in a sample specifically at high accuracy and a reagent used in this method, and the present invention can attain such effect that direct measuring an amount of LDL-cholesterol by widely used automatic analyzers can be conducted by using the invention, which has not been possible after known methods.
摘要:
A process for measuring the degree of coloring of a color producing reagent to be reduced such as a tetrazolium salt with color developing assistants can be applied to clinical examinations such as determination of the amount of H 2 O 2 and determination of peroxidase activity without much suffering from influences of ascorbic acid, bililubin, etc. present in samples.