一种通用的基因组DNA提取方法

目的:探讨一种通厢的基因组DNA提取方法.方法:采用改良的膜法分别从动植物组织、外周血、细菌、细胞等标本提取基因组DNA,DNA样品经紫外吸收、琼脂糖凝胶电泳、PCR扩增和酶切进行榆测.结果:该方法提取的基因组DNA纯度较高,电泳条带清晰,DNA质量能满足下游分子生物学研究的需要.结论:该方法简便快速、适用范围广,是提取基因组DNA的一种有效方法.     

一种蜘蛛基因组DNA的简易提取方法

本文介绍了1种改进的蜘蛛基因组DNA的提取方法.通过与传统DNA提取方法的比较,本方法具有可在常温条件下进行、DNA得率高、简便、经济等优势.     

一种冬虫夏草全基因组DNA的提取方法

冬虫夏草是真菌与昆虫形成的复合生物体,本研究建立了一种可同时提取冬虫夏草真菌子座和虫体全部基因组DNA的方法。该方法稳定高效,简便易行,提取纯度高,适用于冬虫夏草多重PCR、Realtime-PCR和DNA指纹图谱等分子水平的研究。     

家蝇幼虫抗菌物质提取方法的比较

为了探索家蝇幼虫抗菌物质的提取方法,本文采用醋酸提取蝇蛆的抗菌物质,通过加热去除其中不稳定的蛋白成分,再通过切向流超滤和直接冻干法获得复合抗菌物质,测定其中可溶蛋白的含量、抗菌组分的抗菌活性及组成的差异。结果表明,和冻干法相比,利用切向流超滤法可以显著提高抗菌复合物质中可溶蛋白的含量。利用切向流超滤浓缩制备的抗菌物质和直接冻干制备的抗菌物质经过凝胶过滤层析及抗菌活性分析表明,非蛋白组分(A20-A21和B6-B12)比蛋白组分(A1-A2、A10-A13、B1-B2)抗菌谱广。电泳分析蛋白组分表明,其抗菌蛋白组分处在6 k Da-35 k Da的某些蛋白组分中。     

一种动物基因组DNA提取方法的改进

介绍一种动物基因组ＤＮＡ提取方法。该方法具有简便、快速、实用的特点,所获得的ＤＮＡ数量和质量都很高,可用于各种分子生物学实验。     

细菌基因组DNA提取方法概述

细菌基因组DNA提取是分子生物学研究的基础,DNA提取的质量和效率可直接影响后续实验结果的准确性和精确性。综述并比较了近10年细菌DNA提取的几种方法,分析不同方法的提取效率,以期为分子生物学研究提供更可靠的基础。     

蜘蛛基因组DNA提取方法的比较

分别用SDS法,SK251基因组DNA小量抽提试剂盒法,自制试剂盒法,对蜘蛛组织的基因组DNA进行了提取,经比较,自制试剂盒法对提取蜘蛛基因组DNA最简便面又有效的方法。     

一种提取蜘蛛基因组DNA的有效方法

介绍了用尿素法提取蜘蛛基因组DNA。通过与其他DNA提取方法相比较,证明尿素法具有可在室温条件下进行、DNA得率高、完整性好、简单快速等优点。以提取的DNA为模板进行PCR扩增,获得预期大小的、高重复、高GC含量的编码蜘蛛牵引丝蛋白基因的DNA片段。     

一种经济高效提取实蝇基因组DNA的方法

单头实蝇高质量基因组DNA的获得为实蝇分子生态学研究奠定了重要基础。本文提出一种经济高效的实蝇基因组DNA提取方法,该方法广泛适用于不同虫态、不同保存条件的实蝇标本,与传统的CTAB法和SDS法相比操作简单、耗时短,得率高。     

金丝小枣基因组DNA的优化提取方法

采用SDS和CTAB两种方法分离提取金丝小枣基因组DNA,并比较其提取效果。结果表明,改进后的CTAB法可获得高质量、高得率的基因组DNA,可用于金丝小枣的各种分子生物学研究。     

松突圆蚧基因组DNA提取方法的比较

分别采用醋酸钾(KAc)法、十二烷基硫酸钠-蛋白酶K(SDS-PK)消化法、十六烷基三乙基溴化铵(CTAB)法及DNA提取试剂盒(吸附柱型)对单只松突圆蚧的基因组DNA进行提取。同时针对盾蚧科昆虫的特点,在提取前利用氯仿和解剖针去除样品表面的介壳。结果表明,用同种提取方法提取的经氯仿处理与未经处理样本的提取效果无明显差异,而采用解剖针去除介壳的样本提取效果较好。所采用的4种提取方法均能从新鲜标本中提取出DNA,其中CTAB法提取的DNA量较多,而SDS-PK法提取的DNA质量较好。     

A high-throughput protocol for extracting high-purity genomic DNA from plants and animals

DNA extraction techniques that employ the reversible binding of DNA to silica via chaotropic salts can deliver high-quality genomic DNA from plant and animal tissues, while avoiding the use of toxic organic solvents. Existing techniques that use this method are either prohibitively expensive, or are applicable to only a restricted set of taxa. Here we describe a cost-effective DNA extraction technique suitable for a wide range of plant and animal taxa that yields microgram quantities of high-molecular-weight genomic DNA at a throughput of 192 samples per day. Our technique is particularly robust for tissue samples that are insoluble or are rapidly discoloured or oxidized in standard DNA extraction buffers. We demonstrate the quality of DNA extracted using this method by applying the amplified fragment length polymorphism technique to plant species.     

A reliable general purpose method for extracting genomic DNA from Dictyostelium cells

In this protocol, we present a standard method for extracting DNA from cells of the social amoeba Dictyostelium discoideum. While this procedure is similar to other phenol:chloroform-based purification methods, it is modified to account for the high level of carbohydrate and nucleases found in Dictyostelium cells. Genomic DNA can be isolated from wild-type and genetically modified cells using the described protocol, allowing molecular genetic analyses to be performed. Following cell lysis, nucleic acid extraction, and precipitation, the isolated DNA is suitable for digestion by restriction enzymes, amplification by PCR and Southern blotting. This procedure takes approximately 3 h to complete.     

一种优化的植物总DNA提取方法

根据自己提取植物基因组DNA的实际经验,改进了Clark利用CTAB提取植物基因组DNA的方法。在试验过程中发现,通过在研磨材料时加入液氮、用剪去端部的吸头转移含有DNA的溶液,并且将加入RNase A消化RNA的步骤改在最后进行等一系列改进,可以获得高质量的DNA。本文同时就主要提取步骤进行了分析。     

A method for extracting genomic DNA suitable for medium-throughput applications from plant tissues rich in contaminants

Isolating nucleic acids from sources rich in contaminants is particularly cumbersome when treating a large number of samples. Several protocols have been published that address the problem of nucleic acid extraction and purification, but few address sample number. We describe a method for extracting DNA from recalcitrant tree species by using a commercial grinding apparatus. This alleviates the hard work of sample preparation prior to lysis and purification. Our method has been tested extensively on different fruit tree species and in projects that require the simultaneous processing of hundreds of samples. Moreover, it does not require the availability of robotic workstations.     

乙醇保存的动物标本基因组DNA提取方法的比较

为提高从乙醇长期保存的动物标本中提取大分子DNA的质量,用5种不同方法对动物组织进行预处理实验,然后采用SDS／蛋白酶K裂解,酚一氯仿抽提和乙醇沉淀提取总DNA,通过0．8％琼脂糖凝胶对模板进行电泳和PCR产物作鉴定,经比较,用0．9％NaCL法、PBS法和混合液法进行预处理,消除乙醇对Taq酶的影响以及蛋白质和核酸交联问题,为提取动物基因组DNA的3种更理想方法。