Chapter 12, Problem 45RE

Interpretation Introduction

Interpretation:

The unique things about selenocysteine are to be discussed.

Concept introduction:

There are some amino acids that are not the building blocks of protein fragments like citrulline and ornithine. These are the amino acids that are found in the urea cycle.

The standard amino acids are usually found in the body of an organism, which is 20 in total. The other nonstandard amino acids, like hydroxyproline, are formed after translation by the posttranslational modifications.