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Prospec/Leptin Human, N82K PEG/Leptin N82K Human Recombinant, Pegylated/100µg/CYT-1108-100µg-100µg
Cataloguenumber
CYT-1108
Synonyms
Introduction
Leptintakesanimportantpartintheregulationofenergybalanceandbodyweightcontrol.Afterenteringthecirculation,LeptinbindsLEPRwhichresultsintheactivationofseveralmajorsignallingpathways.InthehypothalamusLeptinactsasanappetite-regulatingfactorthatinducesadecreaseinfoodintakeandanincreaseinenergyconsumptionandalsoregulatesbonemassandsecretionofhypothalamo-pituitary-adrenalhormones.Intheperiphery,increasesbasalmetabolism,regulatespancreaticbeta-cellfunctionandinsulinsecretionandaffectsinnateandadaptiveimmunity.
Description
PegylatedLeptinN82KHumanRecombinantproducedinE.Coliisasinglenon-glycosilatedpolypeptidechaincontaining146aminoacids,anadditionalAlaatN-terminusandonemoleculeofPEG20kDaatitsN-terminusacidsandhavingamolecularweightof35.6kDa.HoweverduetoenlargedhydrodymanicvolumeitrunsontheSDS-PAGEas48kDaproteinandingel-filtrationonSuperdex200asover200kDaprotein.PegylatedLeptinN82KHumanRecombinantwaspurifiedbyproprietarychromatographictechniques.
Source
PhysicalAppearance
Formulation
Lyophilizedfromaconcentrated(0.65mg/ml)solutionwith0.003mMNaHCO3Having35-40%protein.
Solubility
ItisrecommendedtoreconstitutethelyophilizedPegylatedLeptinN82Kinsterilewateror0.4%NaHCO3adjustedtopH8-9,notlessthan100µg/ml,whichcanthenbefurtherdilutedtootheraqueoussolutions.
StABIlity
LyophilizedPegylatedLeptinN82Kalthoughstableatroomtemperaturefor3weeks,shouldbestoreddesiccatedbelow-18°C.UponreconstitutionPegylatedLeptinN82Kshouldbestoredat4°Cbetween2-7daysandforfutureusebelow-18°C.Forlongtermstorageitisrecommendedtoaddacarrierprotein(0.1%HSAorBSA).Pleasepreventfreeze-thawcycles.
Purity
Greaterthan99.0%asdeterminedby:(a)Gelfiltrationanalysis.(b)AnalysisbySDS-PAGE.
BIOLOGicalActivity
BiologicalActivityis<than0.1%asdeterminedbyinducingproliferationofBAF/3cellsstablytransfectedwiththelongformofhumanleptinreceptor.Thisabolishmentofactivityresultsfromdrasticallyreducedaffinitytowardleptinreceptor.
Proteincontent
ProteinquantitationwascarriedoutbyUVspectroscopyat280nmusingtheabsorbencyvalueof0.870astheextinctioncoefficientfora0.1%(1mg/ml)proteinsolutionatpH8.0.ThisvalueiscalculatedbythePCGENEcomputeranalysisprogramofproteinsequences(IntelliGenetics).
SafetyDataSheet
SDS