Amino acid (highlight)
by J_Alves - uploaded on May 20, 2010, 2:04 am
The general structure of amino acids, protein's building blocks, with the constituting groups highlighted: in green, the amino group; in yellow, the carboxyl group; in blue, the alpha carbon; and in red, the R group (a.k.a. side chain), which is the only thing that differentiates one amino acid from another. Drawn in Inkscape.