File:Reaction mechanism amidino group transfer in AGAT.JPG

Summary
Figure 9 Transamidination reaction as proposed in the text. Amino acid residues of the protein molecule are shown in black, the substrate in green and the amidino group after its transfer to the Cys407 residue in blue.

Andreas Humm, Erich Fritsche, Stefan Steinbacher and Robert Huber; Crystal structure and mechanism of human L-arginine:glycine amidinotransferase: a mitochondrial enzyme involved in creatine biosynthesis; The EMBO Journal (1997) 16, 3373–3385, doi:10.1093/emboj/16.12.3373