👉 Pentoses are a group of amino acids that are found in various forms (amino acids) within the body and play crucial roles in metabolism. They are also known as proline, methionine, leucine, isoleucine, and valine. Pentoses can be classified into two main types: Proline pentoses (P-tyrosine, P-isoleucine), which are found primarily in the brain, and Leucine pentoses (L-