A developmental biological study of aldolase gene expression in Xenopus laevis-中国期刊网

摘要 WeclonedcDNAsforXenopusaldolasesA,BandC.Thesethreealdolasegenesarelocalizedondifferentchromosomesasasinglecopygene.Intheadult,thealdolaseAgeneisexpressedextensivelyinmuscletissues,whereasthealdolaseBgeneisexpressedstronglyinkidney,liver,stomachandintestine,whilethealdolaseCgeneisexpressedinbrain,heartandovary.InoocytesaldolaseAandCmRNAs,butnotaldolaseBmRNA,areextensivelytranscribed.Thus,aldolaseAandCmRNAs,butnotBmRNA,occurabundantlyineggsasmaternalmRNAs,andstrongexpressionofaldolaseBmRNAisseenonlyafterthelateneurulastage.WeconcludethataldolaseAandCmRNAsaremajoraldolasemRNAsinearlystagesofXenopusembryogenesiswhichproceedsutilizingyolkastheonlyenergysource,aldolaseBmRNA,ontheotherhand,isexpressedonlylaterindevelopmentintissueswhicharerequiredfordietaryfructosemetabolism.WealsoisolatedtheXenopusaldolaseCgenomicgene(ca.12kb)andfoundthatitspromoter(ca.2kb)containsregionsnecessaryfortissue-specificexpressionandalsoaGCrichregionwhichisessentialforbasaltranscriptionalactivity.

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A developmental biological study of aldolase gene expression in Xenopus laevis

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A developmental biological study of aldolase gene expression in Xenopus laevis

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