第1页共217页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第1页共217页AacetylCoAcarboxylaseAnenzymethatcatalyzestheATP-dependentsynthesisofmalonylCoAfromacetylCoAandcarbondioxide,thecommittedstepinfattyacidsynthesis.acetylcholinereceptorAligand-gatedchannelthatpromotesalargeinwardcurrentofsodiumionsandtriggersanactionpotential;composedofapentameroffourkindsofpolypeptidesubunits,thechannelopenstoallowpassageofsodiumandpotassiumionswhentwoacetylcholinemoleculespromotetransientopeningofthechannel.acetylcholinesteraseAnenzymeinthesynapticcleftthatconvertsacetylcholineintocholineandacetate;thisenzymepromotestheclosingoftheacetylcholine-receptormembranebyrapidlyreducingtheconcentrationofacetylcholineintheregionbetweenthepresynapticandthepostsynapticmembranes.第2页共217页第1页共217页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第2页共217页acetyllysine-bindingdomainAdomainconsistingofafour-helixbundlethatbindspeptidescontainingacetyllysine.Alsocalledabromodomain.actinAhighlyconservedproteinfoundinalleukaryotes;instriatedmuscle,itformsthethinfilamentsofthesarcomereandactivatestheATPaseofmyosin.actinomycinApolypeptideantibioticfromStreptomycesthatinhibitstheelongationphaseofRNAsynthesisbybindingtodouble-helicalDNAbyintercalatingwithit,therebypreventingtheDNAfromservingasatemplate.actionpotentialTheincreaseinmembranepotentialandthechangesinsodiumandpotassiumconductancesthatresultfromalterationsinthepermeabilityoftheaxonmembranetothoseions.Alsocallednerveimpulse.activatedcarriersSmallmoleculescarryingactivatedfunctionalgroupsthatcanbedonatedtoothermolecules;forinstance,ATPcarriesactivatedphosphategroupsandCoAcarriesactivatedacylgroups.第3页共217页第2页共217页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第3页共217页activatedmethylcycleAseriesofreactionsinwhichS-methylgroupsfrommethionineareconvertedintoabiochemicallyreactiveformthroughinsertionintoanadenosylgroup;anactiveS-methylgroupcanbetransferredfromS-adenosylmethioninetoacceptormoleculessuchasnorepinephrine.TheremainingpartofthecycleincludestheregenerationofmethioninefromhomocysteineandN5-methyltetrahydrofolate.activationdomainThestructuralregionofatranscriptionfactorthatfacilitatestranscriptioninsomemanner.SeealsoDNA-bindingdomain.BacktoTopactivesiteAspecificregionofanenzymethatbindsthesubstrateandcarriesoutcatalysis.activetransportThetransportofanionoramoleculeagainstaconcentrationgradient,whereDGforthetransportedspeciesispositive;theprocessmustbe第4页共217页第3页共217页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第4页共217页coupledtoaninputoffreeenergyfromasourcesuchasATP,anelectrochemicalgradientofNa+orK+,orlight.actomyosinAcomplexformedinvitrobetweenmyosinandactinthatdisplayscertainpropertiesofmuscles,suchascontractinginthepresenceofATP.acyladenylateAmixedanhydrideinwhichthecarboxylgroupofamoleculeislinkedtothephosphorylgroupofAMP;theformationofacyladenylatesisameansofactivatingcarboxylgroupsinbiochemicalreactions,suchastheformationoffattyacylCoAmoleculesfromafreefattyacidandcoenzymeA.acylcarrierproteinAbacterialpolypeptidethatislinkedtophosphopantetheineandactsasacarrierofthegrowingfattyacylchainduringfattyacidbiosynthesis.adaptationTheresettingofthesensitivitylevelofreceptorsduetothecontinuedpresenceofligands.Alsocalleddesensitization.第5页共217页第4页共217页编...
