a ganglioside Fuc-GD1b (d18:1(4E)) + GDP + H(+) => a ganglioside GD1b (d18:1(4E)) + GDP-beta-L-fucose
a ganglioside fuc-gd1b (d18:1(4e)) + gdp + h(+) => a ganglioside gd1b (d18:1(4e)) + gdp-beta-l-fucose