D-alanine + L-glutamine <=> gamma-L-glutamyl-D-alanine + NH4(+)
d-alanine + l-glutamine <=> gamma-l-glutamyl-d-alanine + nh4(+)
D-alanine + L-glutamine <=> gamma-L-glutamyl-D-alanine + NH4(+)
d-alanine + l-glutamine <=> gamma-l-glutamyl-d-alanine + nh4(+)