Immunogen sequence: QPEVILLDSD LDEPIDLRCV KTRSEAGEPP SSLQVKPETP ASAAVAVAAA AAPTTTAEKP PAEAQDEPAE SLSEFKPFFG NIIITDVTAN CLTVTFKEYV TV. Polycomb group (PcG) proteins are chromatin-associated proteins which are important for embryonic and adult stem cell se