This is catalyzed by PADI4 and it is associated with transcription repression.

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H3R2ci infosheet
Modified variantsHistone H3.3, Histone H3.3C, Histone H3-like centromeric protein A
Modified IsoformsHistone H3.1, Histone H3.2
Writer/s Protein-arginine Deiminase Type-4
PubmedFor more Information

Sites of Arginine Citrullination H3R17ci, H3R26ci, H3R2ci, H3R8ci, H4R3ci