E2F4 regulates transcriptional activation in mouse embryonic stem cells independently of the RB family oleh Jenny Hsu, Julia Arand, Andrea Chaikovsky, Nancie A. Mooney, Janos Demeter, Caileen M. Brison, Romane Oliverio, Hannes Vogel, Seth M. Rubin, Peter K. Jackson, Julien Sage