sentence: In addition , Polycomb-like ( PCL ) proteins , such as PHF1 ( PCL1 ) , MTF2 ( PCL2 ) , PHF19 ( PCL3 ) , C17ORF96 ( EPOP ) , JARID2 , and AEBP2 , are a class of novel regulatory factors of PRC2 that form sub-complexes with PRC2 core components and modulate the recruitment and enzymatic activity of PRC2 ( Hauri et al ., 2016 ) .