<P> Dietary proteins are first broken down to individual amino acids by various enzymes and hydrochloric acid present in the gastro - intestinal tract . These amino acids are further broken down to α - keto acids which can be recycled in the body for generation of energy, and production of glucose or fat or other amino acids . This break - down of amino acids to α - keto acids occurs in the liver by a process known as transamination, which follows a bimolecular ping pong mechanism . </P> <P> Protein biosynthesis relies on four processes: </P> <Ul> <Li> amino acid synthesis </Li> <Li> RNA synthesis </Li> <Li> transcription </Li> <Li> translation </Li> </Ul> <Li> amino acid synthesis </Li>

Where does amino acid breakdown occur in the cell