Chapter 18, Problem 18.63AP

Interpretation Introduction

Interpretation:

Leucine encephalin has to be drawn and also N-terminal and C-terminal has to be identified.

Concept introduction:

• Many amino acids are linked together through amide bonds to form a biologically large molecule known to be proteins.
• Amino functional group is $(-N{H}_2)$ and carboxyl functional group is $(-COOH)$ and a $R$ group is considered as side chain, when all these are bonded to same carbon atom.s
• Endorphins are neurotransmitters.
• Enkephalins are biologically active part of endorphins.
• N-terminal amino acids are those with free $-N{H}_3{}^{+}$ group at the end of the protein.
• C-terminal amino acids are those with $-CO{O}^{-}$ group at the end of the protein.