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The Polycomb gene FIE is expressed (blue) in unfertilised egg cells of the moss Physcomitrella patens (right) and expression ceases after fertilisation in the developing diploid sporophyte (left). In situ GUS staining of two female sex organs (archegonia) of a transgenic plant expressing a translational fusion of FIE-uidA under control of the native FIE promoter. 存档副本. [2009-07-03]. (原始内容存档于2009-06-26).
Schwartz YB, Pirrotta V. Polycomb silencing mechanisms and the management of genomic programmes. Nat. Rev. Genet. January 2007, 8 (1): 9–22. PMID 17173055. doi:10.1038/nrg1981.
Schuettengruber B, Chourrout D, Vervoort M, Leblanc B, Cavalli G. Genome regulation by polycomb and trithorax proteins. Cell. February 2007, 128 (4): 735–45. PMID 17320510. doi:10.1016/j.cell.2007.02.009.
Pirrotta V, Li HB. "A view of nuclear Polycomb bodies." Curr Opin Genet Dev. 2012 Apr;22(2):101-9. doi: 10.1016/j.gde.2011.11.004. PMID: 22178420 (页面存档备份,存于互联网档案馆)
The Polycomb and Trithorax page of the Cavalli lab (页面存档备份,存于互联网档案馆) This page contains useful information on Polycomb and trithorax proteins, in the form of an introduction, links to published reviews, list of Polycomb and trithorax proteins, illustrative power point slides and a link to a genome browser showing the genome-wide distribution of these proteins in Drosophila melanogaster.