INSM1 and breast cancer: scRNA-seq of P7 BC progenies confirmed these bulk sequencing findings, showing a reduction in important BC genes, including Prkca (which encodes PKC), Vsx2, Trpm1, Pcp2, as well as Cabp5, Insm1, and Gag1, in the cKO BC population (Figures 6N and S3B).