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- what pair of reagants can prepare diarylakene shownThe hydrolysis of a biological thioester to the corresponding carboxyl-ate is often more complex than the overall result might suggest. The conversion of succinyl CoA to succinate in the citric acid cycle, for instance, occurs by initial formation of an acyl phosphate, followed by reaction with guanosine diphosphate (GDP, a relative of adenosine diphosphate [ADP]) to give succinate and guanosine triphosphate (GTP, a relative of ATP). Suggest mechanisms for both steps.Chlorhexidine gluconate is available in different products in concentrations of 4% w/vand 0.12% w/v. H ow many milliliters of the more dilute product may be prepared fromeach fluidounce of the more concentrated product?
- When some sugars dissolve in water they spontaneously undergo changes in optical rotation called mutarrotation. The Mutarrotation of D-glucopyranose is catalyzed by acid and bases. 2-Hydroxypyridine is a more effective catalyst than phenol and pyridine for this reaction because: a.Both oxygen and N in 2-hydroxypyridine act as bases increasing the rapid interconversion of sugar b. The OH of 2-hydroxypyridine serves as the base while the current N as the acid. c. 2-hydroxypyridine acts both as a base to remove the proton from the hydroxyl group in the hemiacetal and as an acid to provide a proton to the oxygen in the hemiacetal. d.Phenol and pyridine are very expensive.Identify what compound/s are non-reducing sugarCan someone please give me the reaction and mechanism of the synthesis of Aspirin and please explain the steps and important points. Thank you
- d-Glucuronic acid is found widely in plants and animals. One of its functions is to detoxify poisonous HO-containing compoundsby reacting with them in the liver to form glucuronides. Glucuronides are water soluble and therefore readily excreted. Afteringestion of a poison such as turpentine or phenol, the glucuronides of these compounds are found in the urine. Draw thestructure of the a- and b-glucuronides formed by the reaction of b-d-glucuronic acid and phenol.A is a key intermediate in an enzyme mediated reaction. A immediately reacts further to give B and C. Provide mechanisms to explain the formation of B and C. The reaction takes place in H2O (solvent).The following compound has been found to be an inhibitor of penicillinase. The enzyme can be reactivated by hydroxylamine (NH2OH). Propose a mechanism to account for the inhibition and for the reactivation.
- please explain why this happends, im having trouble in this section. Part A Chymotrypsin, an enzyme that hydrolyzes peptide bonds in proteins, functions in the small intestine at an optimum pH of 7.7 to 8.0. How is the rate of the chymotrypsin-catalyzed reaction affected by each of the following conditions?Imidazoleglycerol‑phosphate dehydratase is an enzyme in the histine biosynthesis pathway. It catalyzes the E1 dehydration of D‑erthyro‑imidazole‑glycerol phosphate to imidazole acetol‑phosphate. This is a rare example of a biological E1 reaction, as most biological elimination reactions occur through E1cB instead. In this reaction, D‑erthyro‑imidazole‑glycerol phosphate is first protonated to form a good leaving group. Then, the leaving group is ejected to form the resonance‑stabilized carbocation shown. Draw curved arrows forming the most stable resonance structure to explain why this reaction goes through an E1 mechanism. Draw curved arrows to form the most stable resonance structure.One of the steps in the metabolic degradation of guanine is hydrolysis to give xanthine. Propose a mechanism.