BackgroundInformation | ABN78isarabbitpolyclonalversionoftheAnti-NeuN,cloneA60(MAB377),NeuNisahighlycharacterizedandcitedmousemonoclonalantibodythatspecificallyrecognizestheDNA-binding,neuron-specificproteinNeuN,whichispresentinmostCNSandPNSneuronalcelltypesofallvertebratestested.NeuNproteindistributionsareapparentlyrestrictedtoneuronalnuclei,perikaryaandsomeproximalneuronalprocessesinbothfetalandadultbrainalthough,someneuronsfailtoberecognizedbyNeuNatallages:INLretinalcells,Cajal-Retziuscells,Purkinjecells,inferiorolivaryanddentatenucleusneurons,andsympatheticganglioncellsareexamples.ImmunohistochemicallydetectableNeuNproteinfirstappearsatdevelopmentaltimepointsthatcorrespondwiththewithdrawaloftheneuronfromthecellcycleand/orwiththeinitiationofterminaldifferentiationoftheneuron.ImmunoreactivityappearsaroundE9.5inthemouseneuraltubeandisextensivethroughoutthedevelopingnervoussystembyE12.5.Strongnuclearstainingsuggestsanuclearregulatoryproteinfunction;however,noevidencecurrentlyexistsastowhethertheNeuNproteinantigenhasafunctioninthedistalcytoplasmorwhetheritismerelysynthesizedtherebeforebeingtransportedbackintothenucleus.Nodifferencebetweenproteinisolatedfrompurifiednucleiandwholebrainextractonimmunoblotshasbeenfound. |