Editing Bookmarking (section)

==Bookmarking by DNA methylation, histone post-translation modification, and histone variants==
Some patterns of [[histone]] modification and the presence of some histone variants on DNA remain unchanged during mitosis and have the potential to act as bookmarks.<ref>{{Cite journal | pmid = 23246430| year = 2013| last1 = Wang| first1 = F| title = Histone modifications and mitosis: Countermarks, landmarks, and bookmarks| journal = Trends in Cell Biology| volume = 23| issue = 4| pages = 175–84| last2 = Higgins| first2 = J. M.| doi = 10.1016/j.tcb.2012.11.005}}</ref><ref>{{Cite journal | pmid = 15616580| pmc = 545808| year = 2005| last1 = Kouskouti| first1 = A| title = Histone modifications defining active genes persist after transcriptional and mitotic inactivation| journal = The EMBO Journal| volume = 24| issue = 2| pages = 347–57| last2 = Talianidis| first2 = I| doi = 10.1038/sj.emboj.7600516}}</ref><ref>{{Cite journal | pmid = 15776021| pmc = 1299280| year = 2005| last1 = Chow| first1 = C. M.| title = Variant histone H3.3 marks promoters of transcriptionally active genes during mammalian cell division| journal = EMBO Reports| volume = 6| issue = 4| pages = 354–60| last2 = Georgiou| first2 = A| last3 = Szutorisz| first3 = H| last4 = Maia e Silva| first4 = A| last5 = Pombo| first5 = A| last6 = Barahona| first6 = I| last7 = Dargelos| first7 = E| last8 = Canzonetta| first8 = C| last9 = Dillon| first9 = N| doi = 10.1038/sj.embor.7400366}}</ref> Patterns of [[DNA methylation]] are generally unchanged and also have the potential to function as bookmarks.