<prompt> Coenzyme A in TCA contains which of the following?ThiamineRiboflavinPanthothenic acidNicotinic acid  <response>: Co-enzyme Activity of Pantothenic Acid - i. The beta mercaptoethanol amine NH2-CH2- CH2-SH contains one thiol or sulfhydryl -SH group. It is the active site where acyl groups are carried. Therefore the co-enzyme A is sometimes abbreted as CoA-SH to denote this active site. ii. The thio ester bond in acyl-CoA is a high energy bond. These acyl groups are transferred to other acceptors, for example: Acetyl CoA Choline - Acetyl choline CoA enzyme is acetyl choline synthase iii. Acyl groups are also accepted by the CoA molecule during the metabolism of other substrates, for example: PyruvateCoANAD - AcetylCoACO2NADH Enzyme is pyruvate dehydrogenase. iv. The impoant CoA derivatives are: Acetyl CoA Succinyl CoA HMG CoA Acyl CoA. v. Co-enzyme A is an impoant component of fatty acid synthase complex. The ACP acyl carrier protein also contains pantothenic acid. Ref: DM VASUDEVAN TEXTBOOK OF BIOCHEMISTRY, EIGHTH EDITION,PG.NO.,472. 