anthocyanidin 3-O-glucoside 2''-O-glucosyltransferase activity
Catalysis of the reaction: UDP-alpha-D-glucose + an anthocyanidin-3-O-beta-D-glucoside = UDP + H+ + an anthocyanidin 3-O-sophoroside.
GO:0016758
hexosyltransferase activity
is_a