From the biosynthetic pathways underscored by these significant changes (Fig. 7b) and by inferring corresponding data from the KEGG pathway (www.genome.jp) and reactions analysis (www.lipidmaps.org), it is deducible that the ST3GAL5, ST8SIA1, B4GALNT1, B3GALT4, ST3GAL1, B4GALT1-4, and GCNT2 enzymatic pathways are significantly increased with PD. This evidence concerns the gene ST3GAL1 and Parkinson disease.