C Select the product of the following aldol condensation reaction. a A b B C [] d D e E A H H H B H KOH, EtOH heat OH с D E
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- The biosynthesis of vitamin D₂ is a two-step reaction, requiring two types of concerted pericyclic reactions. Draw in the arrows for each step and identify the structure of precalciferol. If an electrocyclic reaction is required, identify if it occurs through a conrotatory or disrotatory reaction. HO H H ergosterol hv precalciferol Cast HO ergocalciferolThe aldolase reaction can proceed in reverse as an enzymatic aldol condensation. If the enzyme were not stereospecifi c, how many different products would be obtained?Given the following enzyme catalyzed reaction, identify the class and subclass of the enzyme involved: %3D CH3CH CH,CH2 SCOA SCOA COO СО
- The following data is for the oxidation of catechol (the substrate) to o-quinone by the enzyme o-diphenyl oxidase. Additional data is also provided for when the reaction is run in the presence of Phenylthiourea. All data was acquired by monitoring the change in absorbance at 540 nm. Die volgende data is vir die oksidasie van katekol (die substraat) na o-kinoon deur die ensiem o- difenyloksidase. Bykomende data word ook verskaf vir wanneer die reaksie uitgevoer word in die teenwoordigheid van Phenylthiourea. Alle data is verkry deur die verandering in absorpsie by 540 nm te monitor. 1,01 0,49 0,32 0,25 0,19 [catechol] (mM) Rate (AAU/min) Uninhibited 65,02 47,11 38,44 32,84 26,92 Rate (AAU/min) Phenylthiourea (1.5mM) 46,62 37,45 31,10 27,40 23,36 Using graphical methods, determine what type of inhibitor Phenylthiourea is, as well as the inhibited reaction's K'm and V'max. Following this, determine Phenylthiourea's Ki (also using graphical methods). Please note, the Lineweaver-Burk plot…An amylase result is 550 U/L. A 1:4 dilution is made and reads 180 U/L. What is the reported result?Identify the major and minor product(s) of the following reaction:
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