Reaction catalyzed by alternansucrase (2.4.1.140)
+
2
=
+
2
[Glc(alpha1-6)Glcalpha(1-3)]n
+
2 sucrose
=
[Glc(alpha1-6)Glcalpha(1-3)]n+2
+
2 beta-D-fructofuranose