An ultramicrochemical method using radioactive substrates has been developed for the quantitation of purine nucleoside phosphorylase (NP) activity in single cells. NP activity can reproducibly be measured in both directions of the enzyme reaction. A quantitative relationship between the number of ce
A new method for the enzymic synthesis of nucleosides using purine nucleoside phosphorylase
β Scribed by Hennen, William J.; Wong, Chi Huey
- Book ID
- 118042385
- Publisher
- American Chemical Society
- Year
- 1989
- Tongue
- English
- Weight
- 540 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0022-3263
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We have developed a new assay for purine nucleoside phosphorylase which is based on the release of tritium when [2-3H]inosine is used as the substrate and the reaction is coupled with xanthine oxidase. After the reaction is terminated, residual [2-3H]inosine is adsorbed on charcoal and the supernata
## Abstract BCXβ1777, a novel inhibitor of the enzyme purine nucleoside phosphorylase, mimics the charged ribosyl oxocarbenium ion formed during the transition state of the enzymeβcatalyzed Cο£ΏN bond cleavage of nucleosides. BCXβ1777 is a slowβonset, tightβbinding inhibitor with a __K__~__i__~^\*^ o