The RNA Pol II elongation factor Ell3 marks enhancers in ES cells and primes future gene activation.
Lin C, Garruss AS, Luo Z, Guo F, Shilatifard A. The RNA Pol II elongation factor Ell3 marks enhancers in ES cells and primes future gene activation. Cell. 2013 Jan 17; 152(1-2):144-56.