PLK2 and Parkinson disease: Figure 3D shows the features distribution of specific genes at different spatial locations in PD. The results showed that the gene expression correlation between Snap25 and Plk2 specific expression regions was 0.7001 (Figure 3E), while the gene expression correlation coefficient between Snap25 and Pdzd2 specific expression regions was 0.1264 (Figure 3F), which revealed specific transcriptomes defined by these specific marker maps.