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Item No. 28192
![Histone H4R3Me2s (1-21)-GGK-biotin (trifluoroacetate salt) (Ac-SG-R(me2s)-GKGGKGLGKGGAKRHRKV-GGK(Biotin), [Arg(Me2s)3]-Histone H4 (1-21)-GGK(Biotin), Histone H4 (1-21) (Arg3me2s))](https://cdn2.caymanchem.com/cdn/productImages/28192.png)
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Histone H4R3Me2s (1-21)-GGK-biotin is a peptide fragment of histone H4 that corresponds to amino acid residues 2-22 of the human H4 sequence. It is symmetrically dimethylated at arginine 3 and biotinylated via a C-terminal GGK linker. Symmetric dimethylation of histone 4 at arginine 3 is associated with transcriptional repression.1 It can recruit the DNA methyltransferase DNMT3a, leading to DNA methylation and further transcriptional repression. Histone H4R3Me2s (1-21)-GGK-biotin has been used as a substrate for the qualitative measurement of jumonji domain containing 1B (JMJD1B) arginine demethylase activity and in dot blot assays to verify antibody specificity.2
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1. Arginine methylation: The coming of age. Mol. Cell 65(1), 8-24 (2017).
2. JMJD1B demethylates H4R3me2s and H3K9me2 to facilitate gene expression for development of hematopoietic stem and progenitor cells. Cell Rep. 23(2), 389-403 (2018).