13 (a) Describe the effect of pH on the activity of enzymes A and B..[1](b)Suggest and explain why changes in pH affect the activity of these two enzymes differently.[3][Total: 20] 相关知识点: 试题来源: 解析 a[1]- for citing / description of the effect of (increasing) pH on...
In T. maritima, an [FeFe] hydrogenase has been shown to catalyze the reduction of H+ to H2 using glycolytic products NADH and reduced ferredoxin (Fd) as electron donors (Fig. 5B) (Schut and Adams, 2009). The activity of this enzyme depends on FMN, and this enzyme is thought to have...
Activity was retained when cell integrity was maintained at pH 5.0–6.5 and at salinities of 5 g 100 mL 1. Aminotransferase activity in lysates of two Lb. paracasei strains was maximal at, or close to, pH 6.0 and 30°C but was detectable under simulated cheese conditions. The activity ...
Enzymes in the Environment:Activity,Ecology and Applications This book describes in detail the role of enzymes in the cycling,from the ecological aspect,of carbon and other elements in the environment;how various organisms degrade ortanic matter;plant pathogenesis;symbiotic relationships;molecular... RG...
on the bidirectional transport of solutes and other compounds. Changes in extracellular pH also influence the activity of secreted enzymes and metabolites, most of which have an optimal pH for maximal activity. Major adaptation processes occur, mainly altering the expression pattern of genes that are...
By using a small chromogenic substrate, we first show that the intrinsic activity of the enzymes is fully preserved upon immobilization and does not depend on surface density. However, when using beechwood xylan, a naturally occurring polysaccharide, as substrate, we find that the enzymatic ...
The Structure and Function of Enzymes Chemical reactions in biological systems rarely occur in the absence of a catalyst. These catalysts are specific proteins called enzymes. The striking characteristics of all enzymes are their catalytic power and specificity. Furthermore, the activity of many ...
a comparative analysis on the activity of some enzymes (amylase, pepsin, trypsin) from the median part of the gastro-intestinal tractus, known as involved in the hydrolytic degradation of exogenous glucides and proteins, in three, two summer-old fish species, from a system of controlled growing...
plant kingdom as in the Moraceae and Polygalaceae.Polygala nyikensisis used by the highlanders of Malawi and bordering countries to treat various skin problems of fungal origin. The root of the plant was recently shown to exert its antifungal activity owing to the presence of xanthones [23]....
In preclinical studies, long-term ingestion of nobiletin has been reported to have an anti-obesity effect by altering the activity of the intestinal microbiota [160]. Nobiletin has also been shown to promote thermogenesis of brown and beige adipose tissue and reduce body weight in mice fed a ...