摘要:
A method is provided which is highly sensitive and specific, and is suitable as a clinical test for the determination of physiological substances and trace components in humoral fluid. The method employs a conjugate of an enzyme capable of acting on a water-insoluble macromolecular substance and an antibody against the ligand (1) to be measured or a ligand (2) having an antigenic determinant common to one of the antigenic determinant(s) of the ligand (1). In the method of the invention, steric hindrance of the conjugate is emphasized by the enzyme reaction which is carried out at the boundary between solid phase and liquid phase.
摘要:
The invention relates to a method and novel reagents for detecting a ligand in a biological sample. In the method, the sample is combined with (i) an enzyme or an enzyme bound to a first macromolecular compound, (ii) substrate for the enzyme, and (iii) an antibody complex comprising anti-ligand bound to anti-enzyme and a second macromolecular compound bound to either one or both of the anti-ligand and anti-enzyme. The activity of the enzyme varies as a function of the unknown amount of ligand contained in the biological sample.
摘要:
A biologically active composition comprising an immobilized phase comprising an antigen or an antibody, and an immobilized phase comprising an enzyme, an enzyme inhibitor or activator, and a method of measuring antigen or antibody using the same. According to the method of the invention, antigen with antibody can be detected in a simple procedure and high sensitivity.
摘要:
Method for determining the activity of the angiotensin-converting enzyme comprising the steps of:(1) mixing a liquid containing the angiotensin-converting enzyme with a reagent consisting essentially of X-hippuryl-L-histidyl-L-leucine, hippuricase, peroxidase, 4-aminoantipyrine and H.sub.2 O.sub.2, and(2) colorimetrically measuring the concentration of quinonimine dye produced in step (1).
摘要翻译:用于测定血管紧张素转换酶的活性的方法,包括以下步骤:(1)将含有血管紧张素转换酶的液体与基本上由N-马尿酰-L-组氨酰-L-亮氨酸,马尿酸,过氧化物酶, 4-氨基安替比林和H 2 O 2,和(2)比色测定步骤(1)中产生的醌亚胺染料的浓度。
摘要:
Disclosed are a color developing method utilizing the reaction of an indolyl derivative with an enzyme in the presence of a specific free radical compound and/or a specific chelate compound, and an enzyme immunoassay using the color developing method.
摘要:
An enzyme-labeled immunoassay is performed by the steps of allowing a test sample to react with an enzyme-labeled reagent, allowing a substrate to react with the enzyme to form a signal, and immobilising the enzyme-labeled reagent, with the prevention of a further signal formation from a predetermined time on after the immobilisation of the enzyme-labeled reagent, using an enzyme inhibitor. A device for performing this enzyme-labeled immunoassay includes an absorbent material capable of transporting a developing solution by capillary action, the absorbent material including (a) a developing liquid application zone, (b) an enzyme-labeled reagent zone containing an enzyme-labeled reagent, (c) a sample receiving zone, and (d) an indicator reagent zone capable of immobilising the enzyme-labeled reagent after the reaction of the test sample with the enzyme-labeled reagent in an amount dependent on the assay result, with an enzyme inhibitor being applied to a portion in the absorbent material upstream of the enzyme-labeled reagent zone, which enzyme inhibitor prevents the formation of a signal from a predetermined time on after the enzyme-labeled reagent is immobilised at the indicator reagent zone.
摘要:
There are disclosed a magnetic particle for an immunoassay method, which comprises a core and a coating layer formed on the surface of the core wherein said core comprises an organic polymer matrix and said coating layer comprises a mixed crystal ferrite represented by the formula: M.sub.x Fe.sub.(3-x) O.sub.4 wherein M represents at least one metal selected from the group consisting of Mn, Ni, Zn, Co, Cu, Mg, Sn, Ca and Cd, and x is a number satisfying the relation: 0
摘要:
An immunoassay method using magnetic particles comprising a core and a coating layer on the surface thereof, The core comprises an organic polymer and the coating layer comprises an iron oxide type ferrite coating layer. An antigen or an antibody is bound onto the surface of the coating layer and the particle has a particle size of 0.2 to 3 .mu.m.
摘要:
A multi-pH chemiluminescence-based assay method comprising first-stage light production by the activation by cleavage of a phosphatase cleavable dioxetane derivative within a pH range optimal for enzyme catalysis, followed by the second-stage generation of increased light energy from the products of enzyme-catalyzed cleavage of the dioxetane derivative by the adjustment of the pH to a strongly alkaline pH optimal for the generation of light energy. The assay method is suitable for both solution phase and solid state assay formats. Light generation enhancers can be used further to increase the light yield.
摘要:
A method for determining the activity of cholinesterase comprising the steps of:mixing a solution containing p-methoxybenzoate demethylmonooxygenase, nicotinamide adenine dinucleotide reduced form (NADH) and p-methoxybenzoyl choline cation having the following formula: ##STR1## with a liquid containing cholinesterase, measuring the decrease in absorbance of light by NADH, which is based on a consumption of NADH, and calculating the activity of cholinesterase therefrom.