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 Here, B3GALT4 is linked to Parkinson disease.