Reaction catalyzed by Rhizobium leguminosarum exopolysaccharide glucosyl ketal-pyruvate-transferase (2.5.1.98)

		+			=			+
	phosphoenolpyruvate	+		[beta-D-GlcA-(1->4)-2-O-Ac-beta-D-GlcA-(1->4)-beta-D-Glc-(1->4)-[3-O-(CH3CH(OH)CH2C(O))-4,6-CH3(COO-)C-beta-D-Gal-(1->4)-beta-D-Glc-(1->4)-beta-D-Glc-(1->4)-beta-D-Glc-(1->6)]-2(or 3)-O-Ac-alpha-D-Glc-(1->6)]n	=		[beta-D-GlcA-(1->4)-2-O-Ac-beta-D-GlcA-(1->4)-beta-D-Glc-(1->4)-[3-O-(CH3CH(OH)CH2C(O))-4,6-CH3(COO-)C-beta-D-Gal-(1->3)-4,6-CH3(COO-)C-beta-D-Glc-(1->4)-beta-D-Glc-(1->4)-beta-D-Glc-(1->6)]-2(or 3)-O-Ac-alpha-D-Glc-(1->6)]n	+		phosphate