The ability of the post immune antisera to recognize pathological alpha‐synuclein fibrils was assessed by testing the antisera with brain homogenates from TgM83+/− mice that were intracerebrally injected with pre‐formed alpha‐synuclein fibrils to induce a synucleinopathy, and with a control group of TgM83+/− mice that were intracerebrally injected with bovine serum albumin (BSA) only. Here, SNCA is linked to synucleinopathy.