Reaction catalyzed by alternansucrase (2.4.1.140)

+

=

+

+

sucrose

+

methyl alpha-D-galactopyranoside

=

methyl alpha-D-glucopyranosyl-(1,3)-alpha-D-galactopyranoside

+

methyl alpha-D-glucopyranosyl-(1,4)-alpha-D-galactopyranoside

+

beta-D-fructofuranose