A rapid radiometric assay for dihydrofolate reductase
โ Scribed by Ronald Hayman; Roland McGready; Martin B. Van der Weyden
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 381 KB
- Volume
- 87
- Category
- Article
- ISSN
- 0003-2697
No coin nor oath required. For personal study only.
โฆ Synopsis
A rapid radiochemical procedure for the measurement of dihydrofolate reductase activity is described. The method employs separation of the radiolabeled substrate from the products ofthe reaction by precipitation with acetic acid and zinc sulfate. This method permits rapid processing of samples and eliminates time-consuming column chromatography techniques. Good agreement of results is obtained when the radioactive method is compared to the spectrophotometric assay method.
๐ SIMILAR VOLUMES
This report describes a simple method to measure the activity of dihydrofolate reductase using the substrate [3H]dihydrofolate, which is generated by preincubation of [3H]folic acid for 10 min with dithionite before the enzymatic reaction. The procedure then measures the direct reduction of [3H]dihy
A rapid radiochemical procedure for the measurement of adenosine deaminase is described. The method employs phospho-Sephadex, a weak cation exchanger, which permits the enzymic product inosine to pass unretarded through the gel while the radioactive substrate adenosine is retained. Use of a Millipor
A rapid and simple radiometric assay for cholinesterase, suitable for multiple determinations, has been developed. (aH-acetyl) choline is enzymatically hydrolyzed in a small reaction volume in a scintillation vial. The released [all]acetate is then extracted into a toluene-based scintillator added d