alpha-L-Fuc-(1->2)-beta-D-Gal-(1->4)-D-GlcNAc + GDP-beta-L-fucose => alpha-L-Fuc-(1->2)-beta-D-Gal-(1->4)-[alpha-L-Fuc-(1->3)]-D-GlcNAc + GDP + H(+)
alpha-l-fuc-(1->2)-beta-d-gal-(1->4)-d-glcnac + gdp-beta-l-fucose => alpha-l-fuc-(1->2)-beta-d-gal-(1->4)-[alpha-l-fuc-(1->3)]-d-glcnac + gdp + h(+)
alpha-L-Fuc-(1->2)-beta-D-Gal-(1->4)-D-GlcNAc + GDP-beta-L-fucose => alpha-L-Fuc-(1->2)-beta-D-Gal-(1->4)-[alpha-L-Fuc-(1->3)]-D-GlcNAc + GDP + H(+)
alpha-l-fuc-(1->2)-beta-d-gal-(1->4)-d-glcnac + gdp-beta-l-fucose => alpha-l-fuc-(1->2)-beta-d-gal-(1->4)-[alpha-l-fuc-(1->3)]-d-glcnac + gdp + h(+)