Positive Samples: Mouse brain, Rat brain Immunogen sequence: PSVTKKNTNK KTKPKSDILK DPPSEANSIQ SANATTKTSE TNHTSRPRLK NVDRSTAQQL AVTVGNVTVI ITDFKEKTRS SSTSSSTVTS SAGSEQQNQS SSGSESTDKG SSRSSTPKGD MSAVNDESF. RYBP involves component of a Polycomb group (PcG)