Chromatin remodeling factor. Acts as a 'reader' protein by binding to H3K4me3 and H3K36me3 to control histone H4 acetylation. Increases the transcriptional levels of the flowering time genes FLC and FT (PubMed:25183522, PubMed:25211338). Binds the chromatin at the FT promoter upon interaction with CO (PubMed:25211338). Interacts with HAM1 and HAM2 (PubMed:25183522). Interacts (via MRG domain) with CO (PubMed:25211338). Component of the NuA4 histone acetyltransferase complex (By similarity). Ubiquitous (PubMed:25183522). Mainly expressed in the vasculature of cotyledons and leaves, and in roots and inflorescences (PubMed:25211338). No visible phenotype, due to the redundancy with MRG1. Mrg1 and mrg2 double mutants are late-flowering under long-day growth conditions.