| Immunogen | ImmunogenusedwasabranchedpeptidecorrespondingtotheubiquitinationsiteonhumanhistoneH2B. | 
| Epitope | Lys120ubiquitinationsite | 
| Clone | Clone56 | 
| Host | Mouse | 
| Specificity | RecognizeshistoneH2Bubiquitinatedonlysine120butnotfreeubiquitinorhistoneH2Binitsunmodifiedstate. | 
| Isotype | IgG2aκ | 
| SpeciesReactivity | MouseHumanVertebratesRatGreenPlants
 | 
| SpeciesReactivityNote | Human,mouse,rat.Nottestedinotherspecies.Theimmunogensequenceisidenticalinawiderangeofanimalandplantspecies,sobroadcross-reactivityisexpected. | 
| AntibodyType | MonoclonalAntibody | 
| EntrezGeneNumber |  | 
| EntrezGeneSummary | HistonesarebasicnuclearproteinsthatareresponsIBLeforthenucleosomestructureofthechromosomalfiberineukaryotes.Twomoleculesofeachofthefourcorehistones(H2A,H2B,H3,andH4)formanoctamer,aroundwhichapproximately146bpofDNAiswrappedinrepeatingunits,callednucleosomes.Thelinkerhistone,H1,interactswithlinkerDNAbetweennucleosomesandfunctionsinthecompactionofchromatinintohigherorderstructures.ThisgeneencodesamemberofthehistoneH2Bfamily,andgeneratestwotranscriptsthroughtheuseoftheconservedstem-loopterminationmotif,andthepolyAadditionmotif.[providedbyRefSeq] 
 | 
| GeneSymbol | H2B.1H2B.a/g/h/k/lH2B/aH2B/gH2B/hH2B/kH2B/lH2BFAH2BFGH2BFHH2BFKH2BFL
 | 
| Modifications |  | 
| UniProtNumber |  | 
| UniProtSummary | FUNCTION:Corecomponentofnucleosome.NucleosomeswrapandcompactDNAintochromatin,limitingDNAaccessibilitytothecellularmachinerieswhichrequireDNAasatemplate.Histonestherebyplayacentralroleintranscriptionregulation,DNArepair,DNAreplicationandchromosomalstABIlity.DNAaccessibilityisregulatedviaacomplexsetofpost-translationalmodificationsofhistones,alsocalledhistonecode,andnucleosomeremodeling. 
 Hasbroadantibacterialactivity.Maycontributetotheformationofthefunctionalantimicrobialbarrierofthecolonicepithelium,andtothebactericidalactivityofamnioticfluid.
 
 SUBUNITSTRUCTURE:ThenucleosomeisahistoneoctamercontainingtwomoleculeseachofH2A,H2B,H3andH4assembledinoneH3-H4heterotetramerandtwoH2A-H2Bheterodimers.Theoctamerwrapsapproximately147bpofDNA.
 
 SUBCELLULARLOCATION:Nucleus.
 
 PTM:MonoubiquitinationofLys-120bytheRNF20/40complexgivesaspecifictagforepigenetictranscriptionalactivationandisalsoprerequisiteforhistoneH3"Lys-4"and"Lys-79"methylation.ItalsofunctionscooperativelywiththeFACTdimertostimulateelongationbyRNApolymeraseII.
 
 PhosphorylatedonSer-15bySTK4/MST1duringapoptosis;whichfacilitatesapoptoticchromatincondensation.AlsophosphorylatedonSer-15inresponsetoDNAdoublestrandbreaks(DSBs),andincorrelationwithsomatichypermutationandimmunoglobulinclass-switchrecombination.
 
 SEQUENCESIMILARITY:BelongstothehistoneH2Bfamily.
 
 
 | 
| MolecularWeight | ~25kDa |