In enzymology, a D-alanine gamma-glutamyltransferase () is an enzyme that catalyzes the chemical reaction L-glutamine + D-alanine NH3 + gamma-L-glutamyl-D-alanine Thus, the two substrates of this enzyme are L-glutamine and D-alanine, whereas its two products are NH3 and gamma-L-glutamyl-D-alanine. This enzyme belongs to the family of transferases, specifically the aminoacyltransferases. The systematic name of this enzyme class is L-glutamine:D-alanine gamma-glutamyltransferase. References EC 2.3.2 Enzymes of unknown structure