Cells in cluster 16 could be divided into two subclasses, one expressing BC-enriched genes CHN2 and SCN3A and the other expressing PC markers PDC and AIPL1. The same strategies were performed for cluster 10 (containing RPCs and Müller glia) (S2 Fig), cluster 4 (containing HCs and ACs), and cluster 3 (containing RPC subclasses) (S2 Fig). Here, PDC is linked to breast cancer.