18. Amino Acids and Proteins

Valine is an amino acid with a nonpolar side chain, and serine is an amino acid with a polar side chain. Draw the two dipeptides that can be formed by these two amino acids. Identify the peptide bond.

There are eight amino acids in vasopressin. How many peptide bonds are in this small protein?

What atoms are present in a planar unit in a protein chain?

How many amino acid units do these atoms come from? Why are these units planar?

Draw a tripeptide structure consisting of following amino acids in following order. Name tripeptide using 3 letter codes.