TH and synucleinopathy: After immunostaining for nuclei, Tyrosine Hydroxylase (TH, a marker for dopaminergic neurons) and alpha-synuclein (SNCA, a protein that accumulates in Lewy bodies and Lewy neurites in Parkinson’s disease and other synucleinopathies), we acquired images of isogenic dopaminergic neurons with and without the G2019S mutation.