Stimulation of neurite outgrowth of small cerebellar granule cells. A, Small cerebellar granule cells were grown in the absence or presence of 5 mmManNProp or ManNAc on collagen I (Col) or laminin (LN). Neurite length was quantified and set at 100% in the absence of additives. Error bars represent mean values ± SD of 20 micrographs containing at least 15 cells each.B, Representative micrographs of small cerebellar granule cells cultured on collagen I (Col) or laminin (LN) grown in the absence (control) or presence of 5 mmManNProp.