->4)-alpha-D-Galp-(1->4)-beta-D-Galp-(1->4)-beta-D-Glcp-yl group
->4)-alpha-d-galp-(1->4)-beta-d-galp-(1->4)-beta-d-glcp-yl group
An organic group forming part of, and a proposed epitope within, globoside G<small><sub>M1</sub></small>.