"poly-[1-6]--D-glucopyranosyl-[1-3]--D-glucopyranose glucan (PGG glucan)"[1]
Proprietary name Betafectin
"Betafectin PGG-Glucan, a novel β-(1,6) branched β-(1,3) glucan purified from the cell walls of Saccharomyces cerevisiae"[2]
A form or type of beta-glucan
a macrophage-specific immunomodulator