The methionine molecule in 3-D

The methionine molecule - rotatable in 3 dimensions

3 letter code:     met        1 letter code:    M
Methionine is an amino acid containing sulphur.

Like all amino acids, it has an amino group (-NH2) - blue with 2 white balls - at one end, and a carboxylic acid group (-COOH) - grey, connected to red, and red and white - at the other end. Between these is the α- (alpha) carbon to which the 'R' group (and a single -H atom) is attached.

Its 'R' group is -CH2-CH2-S-CH3. However unlike cysteine it does not form disulphide bonds.

Click below to highlight parts of molecule

Label/ Unlabel atoms