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Prospec/Leptin Receptor Human/Leptin Binding Domain Human Recombinant/5µg/CYT-1106-5µg-5µg
Cataloguenumber
CYT-1106
Synonyms
Introduction
LeptinReceptorisapartofthegp130familyofcytokinereceptorsthatstimulategenetranscriptionbyactivatingcytosolicSTATproteins.LeptinReceptorplaysaroleintheregulationoffatmetabolismandinnovelhematopoieticpathwaythatisobligatoryfornormallymphopoiesis.LeptinReceptorparticipatesintheregulationofcounter-regulatoryresponsetohypoglycemiabyinhibitingneuronsoftheparabrachialnucleus.LeptinReceptoraffectsspecificallyonTlymphocyteresponses.
Description
LeptinBindingDomainHumanRecombinantalsocalledLeptinReceptorproducedinE.Coliisasingle,non-glycosylated,polypeptidechaincontaining208aminoacids(428-635a.a)andanadditionalAlaatN-terminusacidsandhavingamolecularmassof24.5kDa.
TheLeptinBindingDomainispurifiedbyproprietarychromatographictechniques.
Source
PhysicalAppearance
SterileFilteredWhitelyophilized(freeze-dried)powder.
Formulation
Theproteinwaslyophilizedfromaconcentrated(0.2-0.5mg/ml)solutionofTris-HClbuffer,pH9.0with150mMNaCland10-fold(w/w)excessofglycine.
Solubility
ItisrecommendedtoreconstitutethelyophilizedLeptinReceptorinsterile18MΩ-cmH2Onotlessthan100µg/ml,whichcanthenbefurtherdilutedtootheraqueoussolutions.
StABIlity
LyophilizedLeptinReceptoralthoughstableatroomtemperaturefor3weeks,shouldbestoreddesiccatedbelow-18°C.UponreconstitutionLeptinReceptorshouldbestoredat4°Cbetween2-7daysandforfutureusebelow-18°C.Forlongtermstorageitisrecommendedtoaddacarrierprotein(0.1%HSAorBSA).Pleasepreventfreeze-thawcycles.
Purity
Greaterthan99.0%asdeterminedby:(a)Gelfiltrationanalysis.(b)AnalysisbySDS-PAGE.
Aminoacidsequence
ThesequenceofthefirstsixN-terminalaminoacidswasdeterminedandwasfoundtobeAla-Ile-Asp-Val-Asn-Ile.
BIOLOGicalActivity
BiologicalActivityisevidencedbyhighaffinitybindingofmammalianleptinsat1:1molarratio.
Proteincontent
ProteinquantitationwascarriedoutbyUVspectroscopyat280nmusingtheabsorbencyvalueof2.45astheextinctioncoefficientfora0.1%(1mg/ml)solutionatpH9.0.ThisvalueiscalculatedbythePCGENEcomputeranalysisprogramofproteinsequences(IntelliGenetics).
SafetyDataSheet
SDS