摘要:
Disclosed is a sugar and/or a sugar alcohol as a substance for suppressing dephosphorylation reaction of a phosphorylated coenzyme. Also disclosed is a method for stabilizing a phosphorylated coenzyme which is characterized by having at least a substance for suppressing dephosphorylation reaction of the phosphorylated coenzyme coexist with the phosphorylated coenzyme.
摘要:
Disclosed is a sugar and/or a sugar alcohol as a substance for suppressing dephosphorylation reaction of a phosphorylated coenzyme. Also disclosed is a method for stabilizing a phosphorylated coenzyme which is characterized by having at least a substance for suppressing dephosphorylation reaction of the phosphorylated coenzyme coexist with the phosphorylated coenzyme.
摘要:
Disclosed is a reverse transcriptase composition having improved storage stability, comprising a reverse transcriptase, an effective stabilizing amount of at least one organic stabilizing reagent selected from trehalose and a nucleic acid containing a transcriptional initiation site recognizable by the enzyme, and an effective stabilizing amount of a metal salt capable of producing bivalent positive ions in an aqueous solution of the metal salt. Also disclosed is a method for improving storage stability of a reverse transcriptase, which comprises adding the above-mentioned organic stabilizing reagent and metal salt to a reverse transcriptase. The composition of the present invention can be stably stored for a prolonged period of time at a temperature up to at least 4.degree. C. Further, by virtue of a relatively high temperature usable for stable storage, the viscosity of the composition can be advantageously maintained at a low level, so that it becomes possible to accurately dispense the composition by a quantity corresponding to a desired enzyme activity, thereby achieving high reproducibility in experiments using the reverse transcriptase. Therefore, in the determination of a virus, in which a reverse transcriptase activity is used as an index, the composition of the present invention can be advantageously used as a standard substance for determining the amount of virus.
摘要:
Disclosed is a sugar and/or a sugar alcohol as a substance for suppressing dephosphorylation reaction of a phosphorylated coenzyme. Also disclosed is a method for stabilizing a phosphorylated coenzyme which is characterized by having at least a substance for suppressing dephosphorylation reaction of the phosphorylated coenzyme coexist with the phosphorylated coenzyme.
摘要:
Disclosed is a method for quantitatively determining an antibody, contained in a biological sample, having the ability to inhibit the activity of a reverse transcriptase derived from an HIV, comprising: reacting a hybridization product, immobilized on a solid phase, of a primer consisting essentially of oligodeoxythymine nucleotide and an RNA template consisting essentially of adenine ribopolynucleotide with a reverse transcriptase derived from HIV, to thereby bind the reverse transcriptase to the hybridization product; conducting a synthesis of a DNA complementary to the RNA template from a deoxymononucleotide triphosphate in the presence of the reverse transcriptase activity-inhibiting antibody; and measuring the amount of the synthesized DNA and quantitatively determining the above-mentioned antibody, based on the measured amount of the synthesized DNA. The method of the present invention can be performed with ease and with high reproducibility in classifying and quantitatively determining the antibodies against the epitopes of a viral reverse transcriptase. By the method of the present invention, not only the virus having mutated during a latent period thereof, and the properties which the virulis exhibits as a result of the mutation, but also a virus having acquired drug resistance as a result of the administration of the drugs to the host, can be studied by quantitatively determining the antibodies. Further, it has also become possible to accurately and promptly determine the changes in the infected host, such as the change in the ability to produce antibodies, which occur in accordance with the progression of illness.
摘要:
Disclosed is a sugar and/or a sugar alcohol as a substance for suppressing dephosphorylation reaction of a phosphorylated coenzyme. Also disclosed is a method for stabilizing a phosphorylated coenzyme which is characterized by having at least a substance for suppressing dephosphorylation reaction of the phosphorylated coenzyme coexist with the phosphorylated coenzyme.