Points 4. Enzymes are globular proteins that act as biological catalysts by lowering activation energy and accelerating the rate of cellular reactions. (23 points) (1) The following peptide section is selected from an enzyme molecule: valylisoleucylthreonine Please draw the condensed structural formula for this peptide, give its three-letter and one-letter abbreviations and identify the N-terminal and C-terminal amino acid of this tripeptide (15 points)