Keywords: Adenine phosphoribosyltransferase 1ZN7.png Ribbon diagram of a human adenine phosphoribosyltransferase APRTase dimer in complex with phosphoribosyl pyrophosphate adenine and ribose 5-phosphate Units colored from N- to C-terminal end ; one magnesium ion visible in green the other obscured <br>Created using http //www accelrys com/products/downloads/ds_visualizer/index html Accelrys DS Visualizer Pro 1 6 and GIMP ; Legend chartreuse w Magnesium ion From PDB entry http //www rcsb org/pdb/cgi/explore cgi pdbId 1ZN7 1ZN7 2007-05-20 Fvasconcellos 19 25 20 May 2007 UTC Transferases |