Reaction catalyzed by maltose O-acetyltransferase (2.3.1.79)
+
=
CoA
+
acetyl-CoA
+
maltotetraose
=
CoA
+
6-O-acetyl-alpha-D-glucopyranosyl-(1->4)-alpha-D-glucopyranosyl-(1->4)-alpha-D-glucopyranosyl-(1->4)-D-glucopyranose