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1.
苛求芽孢杆菌基因组DNA提取方法的比较   总被引:6,自引:0,他引:6  
目的:比较不同方法提取苛求芽孢杆菌基因组DNA的差异。方法:用经典CTAB提取法、改进CTAB法(溶菌酶处理结合CTAB提取法)、UniQ柱吸附提取法制备苛求芽孢杆菌基因组DNA,比较产物完整性和用于PCR扩增的有效性。结果:三种方法制备基因组DNA纯度接近,但改进CTAB法产率最高,UniQ法产率最低。经典CTAB法和UniQ法提取基因组DNA易降解。三种方法所得基因组DNA用于PCR扩增效率接近。结论:溶菌酶裂解结合CTAB提取更适合制备苛求芽孢杆菌基因组DNA。  相似文献   

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利用改良CTAB法快速小量提取微胚乳玉米基因组DNA   总被引:2,自引:0,他引:2  
为了能快速小量提取微胚乳玉米基因组DNA,以微胚乳玉米幼叶为试材,采用改良CTAB法和传统CTAB法提取微胚乳玉米基因组DNA,并对所提取的DNA通过紫外分光光度计、琼脂糖凝胶电泳和PCR扩增等方法进行检测。两种方法所得基因组DNA的OD260/OD280在1.8~1.9之间,电泳条带清晰,无蛋白质和RNA污染,DNA无明显降解,其浓度和纯度都适合基因工程实验操作的条件。改良CTAB法与传统CTAB法相比更简便快捷,可实现大批量的不同样本基因组DNA的同时提取,提供了一种简便、快捷、有效和实用的微量提取微胚乳玉米基因组DNA方法,可满足以PCR为基础的分子生物学研究。  相似文献   

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以短序大功劳嫩叶为材料,采用CTAB法、CTAB改良法1、CTAB改良法2、SDS法和试剂盒法五种方法提取短序十大功劳基因组总DNA,用分光光度计和琼脂糖凝胶电泳方法检测所得总DNA的纯度和得率,用ISSR-PCR扩增的方法检测所得总DNA的质量。结果表明,五种方法均能从短序大功劳叶片中提取到基因组DNA,但不同方法提取得的基因组DNA的纯度、浓度和得率存在明显的差异。CTAB改良法2和试剂盒法提取的DNA纯度高,可直接用于下游分子生物学实验,CTAB法、CTAB改良法1和SDS法提取的总DNA质量较差,不利于下游的分子生物学实验;五种方法提取的总DNA的得率在10.836~451.709μg/g之间,呈CTAB法>SDS法>CTAB改良法1>CTAB改良法2>试剂盒法的现象。此实验获得的结果可以为短序十大功劳分子生物学研究提供基础。  相似文献   

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松科植物基因组总DNA提取方法的比较   总被引:2,自引:0,他引:2  
目的:研究对比了用不同方法提取红松、樟子松和红皮云杉等3种松科植物叶片基因组DNA的效果,以寻找适合提取松科植物叶片基因组DNA的方法。方法:分别比较了用传统的CTAB法、SDS法以及3种改良的CTAB法提取的上述3种松科植物叶片基因组DNA的电泳、纯度和酶切效果。结果:采用不同方法提取的3种松科植物叶片基因组DNA的质量差异较大。结论:常规CTAB法和SDS法无法提取出高质量松科植物基因组DNA,而改良后的CTAB法的提取效果较好。  相似文献   

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几种中药DNA提取方法的比较研究   总被引:4,自引:0,他引:4  
陈莉  魏莉  周童  李敏瑜  覃玉斌  吴耀生   《广西植物》2007,27(1):137-139,136
以丹参、绞股蓝、三七为材料,分别采取CTAB法和SDS法提取基因组DNA,并通过紫外分光光度法和琼脂糖凝胶电泳对所提取的DNA样品进行检测,将它们在DNA产量、质量等方面的优缺点进行总结。结果表明,CTAB法能从丹参、绞股蓝中提取高质量的DNA,而三七的DNA更适合用SDS法提取。  相似文献   

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采用酚氯仿抽提法、CTAB法和SDS-蛋白酶K法分别对鱼类病原菌柱状黄杆菌提取基因组DNA。使用超微量紫外分光光度计和琼脂糖凝胶电泳检测所提取的基因组DNA的产量和质量,并用PCR扩增对DNA进行了评价。结果显示,3种方法均可提取到柱状黄杆菌的基因组DNA,并能有效扩增细菌16S rDNA序列,但CTAB法提取的DNA产量和质量最高,CTAB法可以作为柱状黄杆菌DNA提取以开展分子生物学研究的首选方法。  相似文献   

7.
以乌桕嫩叶和胚乳为材料,采用改良CTAB法和SDS法提取乌桕基因组DNA,研究提取条件对DNA提取效果的影响,确定β-ME用量、PVP用量、RnaseA酶用量。结果表明,用改良CTAB法提取乌桕叶片和种子时,DNA获取量和提取纯度明显优于SDS法。  相似文献   

8.
以新鲜的牡丹叶片为材料,采用CTAB法、SDS法以及改良CTAB法提取基因组DNA,通过紫外光谱分析法、琼脂糖凝胶电泳等检测方法对牡丹基因组DNA的提取方法进行筛选。在这三种DNA提取方法中,SDS法略好于CTAB法。SDS法DNA得率虽低,但其纯度高,去糖去蛋白等杂质比较干净,且在未加RNA酶的情况下,RNA污染较少。改良CTAB法浓度比CTAB法增大,但纯度仍低于SDS法。所以,牡丹叶片DNA的最佳提取方法为SDS法。  相似文献   

9.
蚧虫基因组DNA不同提取方法的比较   总被引:5,自引:0,他引:5  
实验以日本龟蜡蚧CeroplastesjaponicusGreen,白蜡绵粉蚧PhenacoccusfraxinusTang ,朝鲜球蚧DidesmococcuskoreanusBorchseniush和瘤大球坚蚧EulecaniumgiganteaShinji等 4种蚧虫为材料 ,分别用十二烷基硫酸钠 (SDS)法、十六烷基三乙基溴化铵 (CTAB)法、醋酸钾 (KAc)法和氯化钠 (NaCl)法等 4种方法 ,对单只蚧虫进行基因组DNA提取 ,用 0 8%琼脂糖凝胶电泳检测所提DNA。结果表明 ,4种方法都可以提取到基因组DNA ,但是比较而言 ,CTAB法和NaCl法所提取的DNA质量明显优于SDS法和KAc法 ,并适用于PCR。因此认为 ,CTAB法和NaCl法是实验室提取单只蚧虫基因组DNA更有效而实用的方法。  相似文献   

10.
降香黄檀基因组DNA的提取方法研究   总被引:2,自引:0,他引:2  
目的:建立适合降香黄檀基因组DNA的提取方法。方法:采用常规SDS法、常规CTAB法和改良CTAB法等3种方法提取降香黄檀叶片基因组DNA,经电泳、吸光度、酶切检测比较提取结果;对采用改良CTAB法提取的基因组DNA进行ISSR-PCR检测。结果:改良CTAB法通过增加洗涤样品步骤,有效去除了多糖和多酚类物质,提取的DNA质量好,无降解现象,无蛋白质、盐离子及RNA污染。结论:改良CTAB法是一种高效的提取方法,使用该方法所得DNA的质量完全能够满足相应的分子操作需要。  相似文献   

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Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.  相似文献   

16.
Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.  相似文献   

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Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.  相似文献   

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正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases  相似文献   

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