{"product_id":"abm182662","title":"Histone H4 (Acetyl Lys21) Rabbit Polyclonal Antibody","description":"\u003ch3\u003eBackground\u003c\/h3\u003e\u003cp\u003eCore component of nucleosome. Nucleosomes wrap and compact DNA into chromatin| limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation| DNA repair| DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones| also called histone code| and nucleosome remodeling.|PTM:Acetylation at Lys-6| Lys-9| Lys-13 and Lys-17 occurs in coding regions of the genome but not in heterochromatin.|PTM:Citrullination at Arg-4 by PADI4 impairs methylation.|PTM:Monomethylated| dimethylated or trimethylated at Lys-21. Monomethylation is performed by SET8. Trimethylation is performed by SUV420H1 and SUV420H2 and induces gene silencing.|PTM:Monomethylation at Arg-4 by PRMT1 favors acetylation at Lys-9 and Lys-13. Demethylation is performed by JMJD6.|PTM:Sumoylated| which is associated with transcriptional repression.|PTM:Ubiquitinated by the CUL4-DDB-RBX1 complex in response to ultraviolet irradiation. This may weaken the interaction between histones and DNA and facilitate DNA accessibility to repair proteins.|Belongs to the histone H4 family.|subunit:The nucleosome is a histone octamer containing two molecules each of H2A| H2B| H3 and H4 assembled in one H3-H4 heterotetramer and two H2A-H2B heterodimers. The octamer wraps approximately 147 bp of DNA.|\u003c\/p\u003e","brand":"BT LAB","offers":[{"title":"100ul","offer_id":57661293232468,"sku":"ABM182662","price":176.0,"currency_code":"GBP","in_stock":true},{"title":"50ul","offer_id":57661293265236,"sku":"ABM182663","price":115.0,"currency_code":"GBP","in_stock":true},{"title":"20ul","offer_id":57661293298004,"sku":"ABM182664","price":69.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1040\/1782\/2036\/files\/btlab-1ea4c7287cbfdf5088445786c5a5187a69f59f2a2d1db38ede993084a9fd9773.jpg?v=1792241051","url":"https:\/\/www.abmium.com\/de\/products\/abm182662","provider":"ABMIUM","version":"1.0","type":"link"}