调节性T细胞(Regulatory cell ,简称Treg )是一类控制体内自身免疫反应性的T细胞亚群。目前有越来越多的学者投身于Treg的研究当中,但对于Treg细胞的获取,您真的知道很多吗?科学家们研究发现当细胞受到损伤后,会释放NAD+(Nicotinamide Adenine Dinucleotide),而游离的NAD+能够与细胞上表达的酶ARTC2结合;ARTC2会将ADP-核糖转移到细胞表面蛋白而激活该蛋白,比如P2 ...
超声波提取技术超声波是指频率为20千赫~50兆赫左右的电磁波,它是一种机械波,需要能量载体—介质—来进行传播。超声波在传递过程中存在着的正负压强交变周期,在正相位时,对介质分子产生挤压,增加介质原来的密度;负相位时,介质分子稀疏、离散,介质密度减小。也就是说,超声波并不能使样品内的分子产生极化,而是在溶剂和样品之间产生声波空化作用,导致溶液内气泡的形成、增长和爆破压缩,从而使固体样品分散,增大样品与萃取溶剂之间的接触 ...
总结了丁香园上各位战友的经验,并且总结了sigmaMTT试剂盒和MTT试剂的资料。想进一步交流可以加我的个人微信号:babagowhere。MTT原理:MTT是一种检测细胞功能的方法。细胞在活化增值的过程中,线粒体的能量代谢能够把MTT代谢为蓝紫色的甲臜,甲臜沉积于细胞内或细胞周围,形成甲臜的量与细胞活化的程度成正比,通过盐酸异丙醇或其他溶剂溶解甲臜,用酶标仪测溶液的光密度就可以反映甲臜的量并从而判断细胞活 ...
Methods in Molecular Biology vol.687 Park D.J. (ed.) PCR Protocols Chapter 5PART II :Cloning and SequencingCODEHOP PCR and CODEHOP PCR Primer DesignJeannette P. Staheli, Richard Boyce, Dina Kovarik,and Timothy M. RoseAbstractWhile PCR primer design for the amplification of known seq ...
Methods in Molecular Biology vol.687 Park D.J. (ed.) PCR Protocols Chapter 4PART II :Cloning and SequencingLariat-Dependent Nested PCR for Flanking Sequence DeterminationDaniel J. ParkAbstractMethods detailed in this chapter relate to the use of Lariat-dependent Nested (LaN ...
Methods in Molecular Biology vol.687 Park D.J. (ed.) PCR Protocols Chapter 3PART II :Cloning and SequencingIsolation of Genomic Insertion Sites of Proviruses Using Splinkerette-PCR-Based ProceduresBin YinAbstractThe availability of whole genomic sequences provides a gr ...
Methods in Molecular Biology vol.687 Park D.J. (ed.) PCR Protocols Chapter 2PART II :Cloning and SequencingLong-Range PCR with a DNA Polymerase FusionHolly H. Hogrefe and Michael C. BornsAbstractProofreading DNA polymerase fusions offer several advantages for long-range PCR, inc ...
想做一篇治疗方面的meta分析,都说做系统评价最重要的就是查全、查准文献,在做之前,首先面临的就是查文献这一关。鉴于此,首先师兄将从循证医学基于临床方法学(methodology-based retrieval)的文献检索特点说起。一、传统的基于内容的文献检索方法(content-based retrieval) 医学信息最常用的是MEDLINE和 EMBASE两大数据库,人们在使用这两个数据库时,通常是根据主题,也就是以内容为 ...
养了很久的细胞,有一些经验和体会总结一下,和大家分享一下。关于如何把细胞养的形态很好更漂亮。 1.不同的细胞,喜欢的环境是不一样的。 这个不仅仅是说培养基的不同,还有就是细胞生长的空间密度问题。 有一些细胞是数量多一点比较好生长,生长状态也比较好。这种一般是属于生长速度慢的细胞。譬如内皮细胞。而有一些是细胞是数量少一点细胞状态会生长的比较好,譬如巨噬细胞和某些肿瘤细胞。尤其是巨噬细胞,生长速度非常得快,贴壁速度很快,所以传代时 ...
1,天然培养基血清、组织提取液等血清:主要是小牛血清、胎牛血清营养成分--白蛋白、纤连蛋白、球蛋白、转铁蛋白、蛋白酶抑制剂、生长因子等蛋白质和多肽;40-80mg/ml氨基酸;0.01-1.0vmol/L 尿素; 170-300ug/ml胆固醇、脂肪酸、磷脂等类脂;2-10mg/ml葡萄糖、乳酸、丙酮酸等碳水化合物;1-2mg/ml钙、氯、铁、钾、钠、锌等无机物;014-0.16mol/L胰岛素、甲状腺素等激素;0.1-200nmol/L维生素A、叶 ...
使用SPSS软件进行数据分析文档通过自己论证属实。主成分分析【例子】以全国31个省市的8项经济指标为例,进行主成分分析。第一步:录入或调入数据(图1)。第二步:打开“因子分析”对话框。沿着主菜单的“Analyze→Data Reduction→Factor”的路径(图2)打开因子分析选项框(图3)。图2 打开因子分析对话框的路径图3 因子分析选项框第三步:选项设置。首先,在源变量框中选中需要进行分析的变量,点击右边的箭头符号,将需要的 ...
Cell-Adhesion AssaysDennis F. Kucik and Chuanyue WuSummaryOne of the most important properties of cells that are derived from multicellularorganisms is their ability to adhere to extracellular matrix proteins or other cells. Analysisof cell–extracellular matrix and/or cell ...
PART II:BASIC CELL MIGRATION AND RELATED ASSAYSvol.294 Guan J.-L. (ed.) Cell Migration-Developmental Methods and Protocols Chapter 3Analysis of Cell Migration Using the Dunn Chemotaxis Chamber and Time-Lapse MicroscopyClaire M. Wells and Anne J. RidleySummaryThe directed mig ...
PART II:BASIC CELL MIGRATION AND RELATED ASSAYSvol.294 Guan J.-L. (ed.) Cell Migration-Developmental Methods and Protocols Chapter 3Wound-Healing AssayLuis G. Rodriguez, Xiaoyang Wu, and Jun-Lin GuanSummaryThe wound-healing assay is simple, inexpensive, and one of the earliest ...
PART II:BASIC CELL MIGRATION AND RELATED ASSAYSBoyden Chamber Assayvol.294 Guan J.-L. (ed.) Cell Migration-Developmental Methods and Protocols Chapter 2SummaryThe Boyden chamber assay, originally introduced by Boyden for the analysis ofleukocyte chemotaxis, is based on a cha ...
Cell Migration——An Overviewvol.294 Guan J.-L. (ed.) Cell Migration-Developmental Methods and Protocols Chapter 1SummaryCell migration is an essential process for normal development and homeostasis thatcan also contribute to important pathologies. Not surprisingly, th ...
去年我一直在跟qPCR、逆转录和SYBRGreen QPCR反应做斗争,其中遇到了不少困难,现在已经告别当初的迷茫。当时在我艰难摸索的时候就想,等我都学会了,我一定要写篇帖子,把当初遇到的一些困难和最后是如何解决这些问题的,写出来,一来可以帮助更多像我这样的人,二来也算让自己有点成就感了。其中有一次,RNA提取好了,跑完胶3条带非常漂亮,测了浓度有500ng/ul呢,做完逆转录,满怀信心的做QPCR反应,做完发现Ct值 ...
Setup of a PCR LaboratoryAbstractPCR represents an extremely powerful and central molecular biology method. At the heart of its poweris the exquisite sensitivity offered: single molecule detection in certain contexts. However, with greatpower comes great responsibility. Con ...
Native Promoter Reporters Validate Transcriptional TargetsMethods in Molecular Biology v468. chapter 9Otto Schmalhofer, Simone Spaderna ,and Thomas BrabletzAbstractThe transcriptional activator b-catenin is the key mediator of the canonical Wnt signaling pathway ...
Assaying b-Catenin/TCF Transcription with b-Catenin/TCFTranscription-Based Reporter ConstructsMethods in Molecular Biology v468. chapter 8AbstractTranscription-based reporters have been instrumental in characterizing the Wnt/b-catenin signalingpa ...