The World Around Us

RNA Genetic code at work in part of an mRNA molecule. Each codon includes a code, shown here as three letters, which usually represents a single amino acid.

The genetic code at work in part of a Messenger RNA (mRNA) molecule. Here each codon includes a code, which usually represents a single amino acid. This is a three-letter code, drawn from the four available (A,G,C,U).

Credit: Chris Brown