The Physical Inactivation of Invertase.
نویسندگان
چکیده
منابع مشابه
An invertase inactivator in maize endosperm and factors affecting inactivation.
A protein present in the developing endosperm of maize (Zea mays L.) causes a loss of invertase activity under certain conditions of incubation. This protein, designated an inactivator, inactivates invertase I of maize even in the presence of other proteins. No inactivation of invertase II of maize or yeast invertase has been observed. The inactivator and invertase I are found only in the endos...
متن کاملThe inactivation of invertase by tyrosinase. II. The influence of copper and gold on the oxidation of invertase and pepsin.
Previous studies from this laboratory have demonstrated the oxidation of certain proteins by tyrosinase (1, 2) and the inactivation of invertase by tyrosinase (3, 4). Different tyrosinase preparations vary greatly in their ability to inactivate invertase; in particular, certain dialyzed or very highly purified tyrosinase solutions seem to have lost their ability to oxidize invertase. In Paper I...
متن کاملIn vitro carbohydrate stress: salicylic acid increases soluble invertase activity in Pistacia vera L. in vitro plantlets. Françoise Bernard *, Majid Baghai and Shirin Hadad Kaveh
The action of salicylic acid (SA) has been well investigated in plant resistance against pathogen attacks but its role may be extended to a more global anti-stress plant cell strategy. The expression of defense-related functions may be also enhanced by elevated hexose levels. To verify if there exists a relation between these two defense programs, SA effect on soluble acid invertase (EC 3.2.1.2...
متن کاملRadiation inactivation of the glycoprotein, invertase.
The radiation target size for invertase activity has been determined for the Saccharomyces cerevisiae glycoprotein which contains 50% carbohydrate. Identical inactivation curves were observed for the native enzyme as well as samples depleted of carbohydrate by incubation with Endo-beta-N-acetylglucosaminidase H. The functional unit of 120,000 daltons was unaltered by the per cent of oligosaccha...
متن کاملThe Activity of Yeast Invertase as a Function of Oxidation-reduction Potential
The activity of yeast invertase as a function of oxidation-reduction potential has been investigated using a large number of oxidants and reductants. The activity is constant over the range of E(h) from -270 to +600 mv., but above E(h) = +600 mv. there is a sharp decrease in activity reaching 0 at E(h) = +1,000 mv. The inhibiting action of strong oxidants is upon the enzyme rather than on the s...
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عنوان ژورنال:
- Proceedings of the National Academy of Sciences of the United States of America
دوره 38 3 شماره
صفحات -
تاریخ انتشار 1952