藓类植物传孢类型及其系统演化关系

藓纲包括３个亚纲（Ｂｒｏｔｈｅｒｕｓ,１９２４－１９２５）。泥炭藓亚纲、黑藓亚纲,真藓亚纲,全世界约１００个科,近８００属,约１５０００种。藓类的传孢类型和藓类植物系统演化有密切关系。我们认为传孢不同类型,直接反映了他们的演化程度。我们根据藓类孢子体的分化、蒴齿分化与其机能,分为５种传孢类型。即腐媒传孢型,风媒孢型,汽－风媒传孢型,水媒传孢型,和虫媒传孢型等５种。根据它们的演化程度比较,我们提出了     

EB病毒LMP1在鼻咽癌细胞中调控核转录因子κB活性研究

为了探讨ＥＢ病毒潜伏膜蛋白１（ＬＭＰ１）的致瘤机制,对鼻咽癌细胞中ＬＭＰ１通过核转录因子ｋＢ（ＮＦｋＢ）介导的信号传导途径在鼻咽癌变中的意义进行了研究。利用ＬＭＰ１受四环素衍生物强力霉素诱导表达的鼻咽癌细胞Ｔｅｔ－ｏｎ－ＬＭＰ１ＨＮＥ２,通过ＮＦｋＢ报道基因分析法、凝胶迁移率分析（ＥＭＳＡ）及细胞集落形成率等方法,结合硫代磷酸反义寡核苷酸阻断技术,证实ＬＭＰ１增强鼻咽癌细胞ＮＦｋＢ的ＤＮＡ结合活性     

Four Ubiquitously Expressed Genes,RD(D6S45)–SKI2W(SKIV2L)–DOM3Z–RP1(D6S60E), Are Present between Complement Component Genes FactorBandC4in the Class III Region of the HLA

The association of the HLA class III region with many diseases motivates the investigation of unidentified genes in the 30-kb segment between complement component genesBfandC4. RD,which codes for a putative RNA binding protein, is 205 bp downstream ofBf. SKI2W(HGMW-approved symbol SKIV2L), a DEVH-box gene probably involved in RNA turnover, is 171 bp downstream ofRD(HGMW-approved symbol D6S45).RP1(HGMW-approved symbol D6S60E) is located 611 bp upstream ofC4.The DNA sequence between humanRDandRP1was determined and the exon–intron structure ofSKI2Welucidated.SKI2Wconsists of 28 exons. The putative RNA helicase domain of Ski2w is encoded by 9 exons. Further analysis of the 2.5-kb intergenic sequence betweenSKI2WandRP1led to the discovery ofDOM3Z.The full-length cDNA sequence ofDOM3Zencodes 396 amino acids with a leucine zipper motif. Dom3z-related proteins are present in simple and complex eukaryotes. InCaenorhabditis elegans,Dom3z-related protein could be involved in the development of germ cells. HumanRD–SKI2WandDOM3Z–RP1are arranged as two head-to-head oriented gene pairs with unmethylated CpG sequences at the common 5′ regulatory region of each gene pair. The ubiquitous expression pattern suggests that these four genes are probably housekeeping genes.     

三链核酸稳定性和生物学功能的研究进展

近10年来三链核酸的研究发展迅猛,已经成为分子生物学和基因工程的一个前沿领域.综述了最近在三链核酸稳定性和生物学功能方面的研究进展.较为详细地讨论了影响三链稳定性的各种内源和外源因素如：寡聚脱氧核苷酸(ODN)的长短 、序列、碱基修饰、骨架结构以及温度、酸度、离子强度 、配基等,同时对三链核酸的生物学功能进行了初步的总结,这些功能包括：控制基因转录,保护靶序列防止酶切,充当分子剪刀进行特定位点切割等.     

派伦螨属2新种（蜱螨亚纲：革螨股：派伦螨科）

记述派伦螨属2新种:辽宁派伦螨Parholaspulus liaoningensis sp.nov.和丹东派伦螨Parholaspulus dandongensis sp.nov.。     

呼吸活性的下降可解释水分亏缺对银合欢根瘤固氮酶活性的抑制(英)

在温室条件下研究了水分亏缺对银合欢根瘤的水分关系、固氮酶活性（乙炔还原活性）、呼吸活性以及蔗糖代谢有关酶活性的影响。随着土壤含水量的下降,根瘤水势也相继下降。土壤干旱不但显著地抑制了根瘤乙炔还原的活性,而且对根瘤的呼吸活性、ATP的产生以及催化蔗糖降解的碱性转化酶和蔗糖合成酶的活性也具强烈的抑制作用。然而,根瘤可溶性总糖含量则不受土壤干旱的影响。用呼吸抑制剂DNP处理根瘤后,其固氮酶活性、呼吸活性及ATPI含量都受到极显著的抑制。这都表明,水分胁迫对根瘤呼吸活性及ATP产生的抑制可解释干旱条件下固氮酶活性的下降。     

汉、回、蒙古族拇指类型、环食指长、扣手、交叉臂及惯用手的研究

作者于1996年在内蒙古调查了汉、回、蒙古族5项人类遗传学经典指标(拇指类型、环食指长、扣手、交叉臂、惯用手)。研究结果显示:(1)3个民族间拇指类型、扣手出现率存在显著性差异,交叉臂、惯用手出现率则无显著性差异,环食指长出现率蒙-汉、蒙-回间存在显著性差异;(2)拇指类型、扣手、惯用手出现率无性别间差异,环食指长出现率男女间存在显著性差异;(3)惯用手与扣手、惯用手与交叉臂间存在明显的相互关系,交叉臂与扣手之间则无关;(4)与国外人群比较,3个民族环指长出现率高,交叉臂R型出现率较高,扣手R型出现率较低,惯用手L型出现率高于印度的一些群体。 Abstract:Authors in vestigated 5 general indexes of anthrotogical genetics including pollical type,palmar digital formula,hand clasping,arm folding and handedness in Han,Hui and Mongol nationalities in 1996.The results showed as follows:(1)There were significant differences in the frequency of pollical type and hand clasping in 3 nationalities,but those of arm folding and handedness showed nosignificant difference and the frequencies of palmar digital formula between the Mongol and the Hui revealed significant difference.(2)There were no significant sexual difference in the frequency of pollical type,hand clasping and handedness while the long type (R) of ring finger revealed significant sexual difference.(3)There were obvious correlations between handedness and hand clasping,handedness and arm folding but no relation between arm folding and hand clasping.(4)In comparison with foreign ethnic groups,the 3 nationalities showed higher frequencies of long type (R) of ring finger and right-arm folding but the frequence right-hand clasping revealed slightly lower.The findings showed higher frequence of Left-Handedness than that of Indian population.     

利用农杆菌系统将超甜定基因导入烟草

由pUR528构建中间载体pEHT9,再构建超甜定植物表达载体pBIT7。通过直接转化法将pBIT7导入农杆菌,然后利用农杆菌系统转化烟草。经PCR、PC R-S outhern和Southern杂交证实,超甜定基因已整合到烟草基因组中。 Abstract:pEHT9 was constructed from pUR528,and used for the construction of plant thaumatin expression vector pBIT7.Then pBIT7 was introduced to Agrobacterium through direct transformation.Subsequently tobacco was transformed through Agrobacterium-mediated system.It has been confirmed that thaumatin gene has integrated into the genome of transgenic tobacco by PCR,PCR-Southern and Southern blot analyses.     

八种红树植物幼苗的叶片可溶性蛋白和抗氧化酶活性对光强的响应

红树林湿地生态系统的恢复与重建是我国南方海岸带生态恢复研究的重点领域之一。为明确红树植物光适应的生理生态策略，该文选取无瓣海桑(Sonneratia apetala)、秋茄(Kandelia obovata)、木榄(Bruguiera gymnorhiza)、桐花树(Aegiceras corniculatum)、老鼠簕(Acanthus ilicifolius)、卤蕨(Acrostichum aureum)、银叶树(Heritiera littoralis)和黄槿(Hibiscus tiliaceus)作为研究对象，通过遮荫控制试验，探究这8种红树植物一年生幼苗在不同光照强度(自然光强的100%、45%、30%、10%)处理下的叶片可溶性蛋白含量和抗氧化酶活性的响应特征。结果表明：(1)随光照强度下降，木榄、老鼠簕和卤蕨的叶片可溶性蛋白含量受到的影响较小，而无瓣海桑、秋茄、桐花树、银叶树和黄槿的叶片可溶性蛋白含量则表现出下降趋势。(2)木榄、老鼠簕和卤蕨的超氧化物歧化酶(SOD)和抗坏血酸过氧化物酶(APX)等抗氧化酶活性在10%光照强度处理下的活性与对照无显著差异，而无瓣海桑、秋茄...     

人源类溶菌酶蛋白6在毕赤酵母中的重组表达及活性分析

利用毕赤酵母(Pichia pastoris)重组表达人源类溶菌酶蛋白6(human lysozyme-like protein6,h Lyzl6),对其酶学性质进行分析。根据毕赤酵母密码子偏爱性设计并人工合成h Lyzl6基因,将其连接至含有乙醇氧化酶启动子(AOX1)的p PIC9K质粒构建重组表达载体p PIC9K-hlyzl6;重组表达载体经线性化后电转化入毕赤酵母GS115感受态细胞,经G418筛选获得高拷贝重组菌株后进行甲醇诱导表达。经甲醇诱导72 h后发酵液上清中酶活性达到最高值,发酵液上清经SDSPAGE检测在14.8 k Da处有重组h Lyzl6蛋白条带,分子量符合预期,通过甲壳素亲和层析可对其进行纯化;采用比浊法测定h Lyzl6酶学活性,结果表明h Lyzl6对溶壁微球菌(Micrococcus lysodeikticus)有较好的杀灭作用,最适反应温度为40℃,最适p H为5.5,其酶活力为54 700U/mg,Cu2+对其活性有明显抑制,EC50为30.2799 mg/L。采用基因工程方法首次在毕赤酵母GS115成功表达了重组h Lyzl6,证实其在体外具有杀菌活性,初步揭示h Lyzl6在男性生殖系统先天性免疫中发挥了一定作用,为进一步研究h Lyzl6的功能和应用开发奠定了基础。