ST3GAL2 and Parkinson disease: Intriguingly, lower expression of the glycosyltransferases B3GALT4 and ST3GAL2 has been found in the SN of PD subjects,19 as well as a reduction of the α‐galactosidase, β‐hexosaminidase, β‐galactosidase, and neuraminidase pathways.3