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- In serine protease catalytic triad mechanism, the first and second products that leaves the active site are Carboxylic acid and amide respectively Amide and carboxylic acid respectively Ester and amide respectively Carboxylic acid and ester respectivelyWhat is the mechanism of an enzyme reaction involving a coenzyme for Nucleophilic Addition Rxns? GiveIf the substrate for an enzyme catalyzed reaction contained a negative charge, which of the following amino acids would most likely be present in the active site to provide electrostatic destabilization of the ES complex? Leu Val O Asp O LYS QUESTION 15 What is the function of the histidine in the diagram of the mechanism at right with the substrate, a phenylalanine residue? (n) His Asp Nucleophilic affack by water stabilization of a metal ion covalent catalysis electrostatic attraction of the substrate O acid base catalysis 789 Mustly cloudy Click Save and Submit to save and submit. Click Save All Ansuwers to save all answers. here to search
- Unbranched homopolymer of N-acetyl glucosamine is : 1.Cellulose 2.Chitin 3.Curcumin 4.Concanavalin AWrite a balanced equation for the synthesis of TMP from dUMP that is coupled to the conversion of serine into glycine.Mucins found on adenocarcinoma cells carry O-glycans terminated with sialic acids (such as the Sialyl Tn antigen) that are smaller and less branched than O-glycans found in healthy epithelial cells. Based on what you know about the biosynthetic pathway for O-glycans, explain this observation.
- Lysozyme is an enzyme that hydrolyzes bacterial cell wall polysaccharides. When this reaction is carried out in the presence of H218O, it is observed that there is retention of configuration at the C1 carbon of the D site sugar as shown below: Would this result suggest that the enzyme mechanism involves the direct nucleophilic attack of water at C1 or that the enzyme mechanism involves attack by a nucleophilic amino acid side chain of the enzyme that generates a transient covalent intermediate?The M and H subunits of lactate dehydrogenase have very similar sizes and shapes but differ in amino acidcomposition. If the only difference between the two were that theH subunit had a glutamic acid in a position where the M subunithad a serine, how would the five isozymes of LDH separate on electrophoresis using a gel at pH 8.6?B-lactamase is an enzyme found in many antibiotic-resistant bacteria that hydrolyzes and inactivates antibiotics like penicillin and cephalosporin. The amount of antibiotic hydrolyzed in 1 minute in a 10-ml solution containing purified ß-lactamase was measured as a function of antibiotic concentration. The kinetics of hydrolysis was performed for two antibiotic substrates (A and B). Assume that the concentration of ß-lactamase was kept constant during the assay. 12 Initial Velocity (nanomole/min) 10 8 2 0 10 20 | 30 [Antibiotic] (µm) 40 50 Antibiotic A Antibiotic B a) Based on the enzyme description, what type of enzyme is ß-lactamase? Lyase Isomerase Ligase Hydrolase Oxidoreductase Transferase b) Based on your answer in (a), what other reactant, in addition to the antibiotic substrate, needs to be in the active site of ß-lactamase for the hydrolysis reaction to proceed? c) From the reaction curves above, what is the approximate value of Vmax for the enzyme reaction? (Do not forget the…