Question: amino acid has methyl group?
Answer: Aliphatic amino acids. The side chains of glycine, alanine, valine, leucine, and isoleucine, shown in Figure , contain saturated carbon‐carbon and carbon‐hydrogen bonds only. ... Alanine has a methyl group for its side chain, valine a 3‐carbon side chain, while leucine and isoleucine have 4‐carbon side chains.