该【分子生物学 】是由【小屁孩】上传分享,文档一共【99】页,该文档可以免费在线阅读,需要了解更多关于【分子生物学 】的内容,可以使用淘豆网的站内搜索功能,选择自己适合的文档,以下文字是截取该文章内的部分文字,如需要获得完整电子版,请下载此文档到您的设备,方便您编辑和打印。:apolymerorchainofaminoacids,whosesequenceisdeterminedbythemRNAtemplateurringaminoacids43=64;thusseveraltrinucleotidesequences(codons),;Factoryforproteinsynthesis;posedofribosomalRNAandribosomalproteins(knownasaRibonucleoproteinorRNP).TheytranslatemessengerRNA(mRNA)tobuildpolypeptidechainsusingaminoacidsdeliveredbytransferRNA(tRNA).;a60SsubunitholdsthreerRNAs(5S,,28S)andabout40proteins,anda40Ssubunitcontainsan18SrRNAandabout30proteins,;theresult,astructureinwhichmanyribosomestranslateanmRNAintandem,,madebycellitself;,whichare3-(polypeptide).:providestructurethathelpcellsintegrityandshape();serveasenzymesandhormones;bindandcarrysubstanceandcontrolactivitiesofgenes….7Fourlevelsofaprotein'sstructure:Primarystructure::Differentconformationthatcanbetakenbythepolypeptide::ponentsofthepolypeptideintothree-,usuallycalledproteinsubunits,:DNApolymerases,lactatedehydrogenase,trypsinTransport:hemoglobin,ransporters,serumalbuminStorage:ovalbumin,egg-whiteprotein,ferritinMotion:myosin,actin,tubulin,flagellarproteinsStructuralandmechanicalsupport:collagen,elastin,keratin,viralcoatproteinsDefense:plementfactors,bloodclottingfactors,proteaseinhibitorsSignaltransduction:receptors,ionchannels,rhodopsin,Gproteins,signallingcascadeproteinsControlofgrowth,differentiationandmetabolism:repressorproteins,growthfactors,cytokines,bonemorphogenicproteins,peptidehormones,celladhesionproteinsToxins:snakevenoms,choleratoxin10TypesofcontrolinEukaryotesTranscriptional,regulatetranscription,,,preventtranslation;,aftertheproteinhasbeenproduced:modifyproteinstoregulateitshalf-life,localization,etc.
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