Two theoretical problems concerning the irreversible modification kinetics of enzyme activity
โ Scribed by Zhi-Xin Wang
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 459 KB
- Volume
- 142
- Category
- Article
- ISSN
- 0022-5193
No coin nor oath required. For personal study only.
โฆ Synopsis
Some years ago, a systematic study on the kinetics of irreversible modification of enzyme activity was presented by Tsou (1988, Adv. Enzymol. Relat. Areas molec. Biol. 61, 381-436). This paper presents a discussion of the theoretical aspects of Tsou's method for the determination of the rate constants for the irreversible modification reaction. Range of validity for the kinetic equations of substrate reaction in the presence of the modifier is discussed quantitatively. The expressions of A, B, v* and [P]oo for any enzyme catalyzed reaction mechanism are derived.
๐ SIMILAR VOLUMES
The kinetic approach previously developed (Tsou 1988, Adv. Enzymok 61,381-386) for the substrate reaction in the presence of modifier is based on the supposition that [Yo]>> [Eo]. However, the presence of the modifier in large excess of the enzyme sometimes leads to a rate of modification which is t
Time-dependent inhibition of enzymes by active-site-directed reagents is usually assumed to be a pseudo-first order process. However, we have noticed that the semilogarithmic plots reported by many workers and obtained by ourselves (for the inhibition of diamine oxidase by carbonyl group reagents) a