The E2F6.com-1 complex, consisting of transcription factors E2F6, TFDP1 (DP 1), MGA, MAX, histone methyltransferases EHMT1 (GLP) and EHMT2 (G9a), in complex with CBX3 (HP1gamma) and likely PRC1.6, binds to the E2F1 gene promoter. Presence of PRC1.6 components at the E2F1 gene promoter has not been tested, but is assumed based on association of PRC1.6-interacting protein CBX3 with the E2F1 promoter and the joint binding of CBX3 and PRC1.6 to the E2F6.com-1 complex (Ogawa et al. 2002). Besides the E2F1 gene promoter, the complex of E2F6.com-1 with CBX3 and possibly PRC1.6 was shown to bind to promoters of other genes involved in cell cycle progression, namely MYC, CDC25A and TK1 (Ogawa et al. 2002). However, transcriptional regulation of MYC, CDC25A and TK1 by E2F6 has not been directly demonstrated, and therefore association of E2F6 with these gene loci is not shown.