Ganglioside GM1 (ammonium salt), derived from bovine brain, is a type of ganglioside used in research, particularly for neurological studies. It's a monosialylated ganglioside, meaning it contains one sialic acid residue, and is known for its role as a functional receptor for Cholera toxin. Ganglioside GM1 is found in various cell types, including neurons, and is enriched in lipid rafts of cell membranes.