简介: "爸爸,妈妈,你们为什么要分开?"一个小男孩在他的父母离婚、爸爸离开家时尖叫着,眼泪一滴一滴地从脸上落下来. "爸爸,妈妈,为什么你们不能给我一个美满的家庭呢?"又一个经受父母离婚的孩子痛苦地想着. 孤儿院里,那些被父母丢弃的孩子伤心地问院长:"我的爸爸妈妈呢?"……
简介:对木头开发和形成的分子的生物研究是相关基因的发现的最近的年,而是步里的焦点,他们在木头性质的控制的函数是慢的。它在另外的工具上的高产量能力,敏感,和可靠性的优点为调查能够的基因表示patternsis开发了的microarraytechniquewith很快assaying几千基因。在这研究,从开发白杨木部纸巾的二个cDNA图书馆准备的cDNAmicroarray从Populusdeltoides的主要的茎在不同高度在不成熟的木部纸巾习惯于试金基因表示模式(15?岁),它被证实有不同木头性质(microfibrillar角度,木质的密度)旁边X光检查。有在薄片之间的微分表示侧面的274个抄本外面被屏蔽,并且单个克隆受到5定序。用生物信息的分析,我们识别了可以影响白杨木头性质的候选人基因,许多哪个属于各种各样规章并且信号transduction基因家庭例如锌手指蛋白质抄写因素,DNA有约束力的抄写因素,乙烯反应因素等等。结果建议这些基因可以调整涉及木头形成的酶。进一步的工作将被执行克隆这些基因并且决定他们怎么影响白杨木头性质。
简介:Phytohormoneabscisicacid(ABA)wascriticalformanyplantgrowthanddevelopmentalprocessesincludingseedmaturation,germinationandresponsetoenvironmentalfactors.WiththepurposetodetectthepossibleABArelatedsignaltransductionpathways,wetriedtoisolateABA-regulatedgenesthroughcDNAmacroarraytechnologyusingABA-treatedriceseedlingasmaterials(undertreatmentfor2,4,8and12h).Of6144cDNAclonestested,37differentialclonesshowinginductionorsuppressionforatleastonetime,wereisolated.Ofthem30and7wereup-ordown-regulatedrespectively.Sequenceanalysesrevealedthattheputativeencodedproteinswereinvolvedindifferentpossibleprocesses,includingtranscription,metabolismandresistance,photosynthesis,signaltransduction,andseedmaturation.6cDNAcloneswerefoundtoencodeproteinswithunknownfunctions.RegulationbyABAof7selectedclonesrelatingtosignaltransductionormetabolismwasconfirmedbyreversetranscriptionPCR.Inaddition,somecloneswerefurthershowntoberegulatedbyotherplantgrowthregulatorsincludingauxinandbrassinosteroid,which,however,indicatedthecomplicatedinteractionsofplanthormones.PossiblesignaltransductionpathwaysinvolvedinABAwerediscussed.
简介:FemaleinflorescenceofBetulaplatyphyllawassampledatanintervalofeachtwodaystoanalyzethebackgroundofgeneexpressioninfloralphase.OnthebasisofSMARTstrategy,thedrivercDNAwasobtainedfromtotalRNAofthelastsampleandthetestercDNAwasfromthatoftheothersbyRT-PCRwhichweresubsequentlyusedtoconstructasubtractedcDNAlibrary.TheresultoftheESTs(expressionsequencetags)blastXshowedthatthegenesinthesubtractedcDNAlibrarycouldbemainlyclusteredinto5groupsrelatedtometabolism,transportationandsignaltransduction,cellcycle,stressresponse,andregulation.Therelationshipbetweengeneexpressionanddevelopmentwasalsodiscussed.
简介:Objective:Toclonemultidrugresistance(MDR)relatedgenesinlungadenocarcinomacelllines.Methods:ThedifferentiallyexpressedcDNAfragmentsbetweenA549andA549DDPcellswereanalyzedbymRNAdifferentialdisplayPCR(DDRT-PCR).ThefragmentsthusobtainedwerefurtheranalyzedbyDNAsequencingandNorthernblotting.Results:ThreedifferentiallyexpressedcDNAfragmentswereobtainedandconfirmedbyNorthernblot.Sequenceanalysisrevealedthattwoofthemwerenovelandonewas100%identicalwithICEgene.Conclusion:AnalyzingdifferentiallyexpressedfragmentbetweenA549andA549DDPcellsmaybehelpfulforfindingnewMDRrelatedgenes.ThedrugresistanceofA549DDPcellsmayberelatedtotheinhibitionordown-regulationofICEgene.