ganglioside GM1/1b(1-)
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http://purl.obolibrary.org/obo/CHEBI_88056
An anionic ganglioside obtained by deprotonation of the neuraminosyl carboxy groups of any member of the GM1/1b family of gangliosides; major species at pH 7.3. GM1/1b ganglioside head groups include 4 neutral sugar groups and 1 sialic acid group.