The Valine molecule - rotatable in 3 dimensions

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3 letter code:     val        1 letter code:    V
Valine is an aliphatic amino acid. It can also be described as propyl-aminoethanoic acid or propyl-aminoacetic acid.

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 is attached.

In valine, the 'R' group is a propyl group (-C3H7) -CH(CH3)2. It is therefore 2 stages up from alanine.
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