CDKN1B and posterior cortical atrophy: To discover potential new cell surface markers and therapeutic targets in quiescent PCa cells, we used PC3 cells stably transduced and clonally selected carrying fluorescent reporters for Cip/Kip CDKN1B (p27) conjugated to mVenus and a peptide from DNA replication licensing factor CDT1 conjugated to mCherry, which we term “PC3 Venus-Cherry” cells and have recently described in detail [13].