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Prospec/Leptin Human, N82K/Leptin Human Recombinant, N82K/50µg/CYT-1107-50µg
Cataloguenumber
CYT-1107
Synonyms
Introduction
Leptintakesanimportantpartintheregulationofenergybalanceandbodyweightcontrol.Afterenteringthecirculation,LeptinbindsLEPRwhichresultsintheactivationofseveralmajorsignallingpathways.InthehypothalamusLeptinactsasanappetite-regulatingfactorthatinducesadecreaseinfoodintakeandanincreaseinenergyconsumptionandalsoregulatesbonemassandsecretionofhypothalamo-pituitary-adrenalhormones.Intheperiphery,increasesbasalmetabolism,regulatespancreaticbeta-cellfunctionandinsulinsecretionandaffectsinnateandadaptiveimmunity.
Description
LeptinN82KHumanRecombinantproducedinE.Coliisasingle,non-glycosylated,polypeptidechaincontaining146aminoacids(andadditionalAlaatN-terminusacids)andhavingamolecularmassof16kDa.
TheLeptinN82Kispurifiedbyproprietarychromatographictechniques.
Source
PhysicalAppearance
Formulation
Lyophilizedfromaconcentrated(1mg/ml)solutionwith0.0045mMNaHCO3.
Solubility
ItisrecommendedtoreconstitutethelyophilizedleptinN82Kinsterilewateror0.4%NaHCO3adjustedtopH8-9,notlessthan100µg/ml,whichcanthenbefurtherdilutedtootheraqueoussolutions.
StABIlity
LyophilizedleptinN82Kalthoughstableatroomtemperaturefor3weeks,shouldbestoreddesiccatedbelow-18°C.UponreconstitutionleptinN82Kshouldbestoredat4°Cbetween2-7daysandforfutureusebelow-18°C.Forlongtermstorageitisrecommendedtoaddacarrierprotein(0.1%HSAorBSA).Pleasepreventfreeze-thawcycles.
Purity
Greaterthan98.0%asdeterminedby:(a)Gelfiltrationanalysis.(b)AnalysisbySDS-PAGE.
Aminoacidsequence
ThesequenceofthefirstfiveN-terminalaminoacidswasdeterminedandwasfoundtobeAla-Val-Pro-Ile-Gln.
BIOLOGicalActivity
BiologicalActivityis<than0.1%asdeterminedbyinducingproliferationofBAF/3cellsstablytransfectedwiththelongformofhumanleptinreceptor.
Proteincontent
ProteinquantitationwascarriedoutbyUVspectroscopyat280nmusingtheabsorbencyvalueof0.87astheextinctioncoefficientfora0.1%(1mg/ml)solutionatpH8.0.ThisvalueiscalculatedbythePCGENEcomputeranalysisprogramofproteinsequences(IntelliGenetics).
SafetyDataSheet
SDS