Histone H4K20 tri‐methylation at late‐firing origins ensures timely heterochromatin replication Julien Brustel, Nina Kirstein, Fanny Izard, Charlotte Grimaud, Paulina Prorok, Christelle Cayrou, Gunnar Schotta, Alhassan F Abdelsamie, Jérôme Déjardin, Marcel Méchali, Giuseppe Baldacci, Claude Sardet, Jean‐Charles Cadoret, Aloys SchepersEric Julien The EMBO Journal (2017) 36: 2726–2741