Required to initiate and then maintain lateralized gene expression in the ASE sensory neurons (PubMed:20923973). Involved in determining cell fate in the ASE neurons (PubMed:20923973). Essential protein required to maintain expression of homeotic genes egl-5 and mab-5 (PubMed:10648230). May play an analogous role to the trithorax Group (trxG) proteins (PubMed:10648230). TrxG proteins form multiprotein complexes that are required to maintain the transcriptionally active state of homeotic genes throughout development (PubMed:10648230). May act via a modification of chromatin (PubMed:10648230). Widely expressed throughout embryonic development and into adulthood. Expressed from mid-blastula.