Fig. 3
From: Non-canonical amino acid labeling in proteomics and biotechnology
Examples of non-canonical amino acids. Chemical structures of amino acids highlighted in this review: methionine (Met), homoallylglycine (Hag), homopropargylglycine (Hpg), azidohomoalanine (Aha) and azidonorleucine (Anl). Azidophenylalanine (Azf), and acetylphenylalanine (Acf) are analogs of phenylalanine. Propargyloxyphenylalanine (Pxf) is a tyrosine analog (See Table 1 for more discussion of these ncAAs)