PCDH20 and breast cancer: However, in our study we found interesting networks consisted of subtype-specific interacting genes and RBPs: a network of only 2 RBPs (RBM20 and PCDH20) and 2 genes (HOXB3 and RASSF7) for luminal A, a network of 21 RBPs and 53 DEGs for luminal B, a HER2-specific network of 14 RBPs and 30 DEGs, and a network of 54 RBPs and 302 DEGs for basal BC.