beta-D-Gal-(1->3)-beta-D-GlcNAc-(1->3)-alpha-D-Gal-yl group
beta-d-gal-(1->3)-beta-d-glcnac-(1->3)-alpha-d-gal-yl group
An α-<small>D</small>-galactosyl group derived from β-<small>D</small>-Gal-(1→3)-β-<small>D</small>-GlcNAc-(1→3)-α-<small>D</small>-Gal The minimum precursor oligosaccharide sequence required by the ABO blood group system to form antigens. This sequence is for Type 1 chains found in secretions.