EZH1, a homolog of EZH2 encoded by a separate locus [21], has much less methyltransferase activity and cannot substitute for EZH2 in histone methylation and related biological functions in many tissues [22]. differentiation, PRC2 establishes new H3K27 methylation sites, especially … Continue reading EZH1, a homolog of EZH2 encoded by a separate locus [21], has much less methyltransferase activity and cannot substitute for EZH2 in histone methylation and related biological functions in many tissues [22]