[Character of loosely and tightly bound human cerebral gangliosides and methods of preparatory extraction].

The quantitative isolation of loosely and tightly bound gangliosides of human brain has been studied following various ways of extraction. Hot methanol extraction (Bogoch's method) gave a higher level of tightly bound gangliosides than by extraction with the Folch method. Both kinds of gangliosides were found to have the same fractional composition on thin layer chromatography on silicagel. A single extraction method of gangliosides giving high yields is proposed.