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PacBio单分子超长测序-陈巍学基因(3)

Pacific Biosciences公司的单分子测序技术,最长的读长可达3万个碱基。是目前最长的测序技术。同时可以测到DNA上的甲基化修饰,测序的速度也很快。

本课程介绍了期测序的化学原理、芯片设计,优点、不足、限制因素。

2014-12-24 课时:16分钟

单分子分析方法研究运动蛋白

Molecular motor proteins are fascinating enzymes that power much of the movement performed by living organisms. In the first part of this lecture, I will provide an overview of the motors that move along cytoskeletal tracks (kinesin and dynein which move along microtubules and myosin which moves along actin). The main focus of this lecture is on how motor proteins work. How does a nanoscale protein convert energy from ATP hydrolysis into unidirectional motion and force production? What tools do we have at our disposal to study them? The first part of the lecture will focus on these questions for kinesin (a microtubule-based motor) and myosin (an actin-based motor), since they have been the subject of extensive studies and good models for their mechanisms have emerged. I conclude by discussing the importance of understanding motor proteins for human disease, in particular illustrating a recent biotechnology effort from Cytokinetics, Inc. to develop drugs that activate cardiac myosins to improve cardiac contractility in patients suffering from heart failure. The first part of the lecture is directed to a general audience or a beginning graduate class.

In the second part of this lecture, I will discuss our laboratories current work on the mechanism of movement by dynein, a motor protein about which we still know very little. This is a research story in progress, where some advances have been made. However, much remains to be done in order to understand how this motor works.

The third (last) part of the lecture is on mitosis, the process by which chromosomes are aligned and then segregated during cell division. I will describe our efforts to find new proteins that are important for mitosis through a high throughput RNAi screen. I will discuss how we technically executed the screen and then focus on new proteins that are we discovered that are involved in generating the microtubules that compose the mitotic spindle. I also discuss the medical importance of studying mitosis, including the development of drugs targeted to mitotic motor proteins, which are currently undergoing testing in clinical trials.

2016-04-21 课时:26分钟

单分子超高灵敏度检测技术介绍

默克独创Erenna®单分子免疫检测平台,采用专利单分子检测技术,突破蛋白检测极限,创领生物标志新发现,助力疾病研究再创新。 SMC™技术相较于传统免疫检测技术,信噪比有了很显著的改善,使得在一个系统里可以同时检测低表达和高表达的蛋白靶标,揭示疾病相关生物标志物的微小变化。SMC™技术在经典的三明治免疫夹心原理基础上,通过创见性的洗脱步骤使得荧光素标记的检测抗体从免疫复合物中解离下来。并最终在默克Erenna®系统的毛细管检测空间内以单个分子的形式被激光激发,相应的光学信号被灵敏地记录下来并进行定量计算。检测下限可以下探到1fM。

2018-03-07 课时:3分钟

单分子测序开启转录组学研究新时代

以基因测序技术发展为背景,阐述以第三代测序技术为核心的全长转录组测序与二代测序技术的转录组测序的差异,以及在研究基因结构等问题上所带来的巨大优势。并以经典案例为参考,阐述全长转录组测序在样品制备、实验设计及数据分析等环节的切入点和注意事项。

2017-09-15 课时:49分钟

高端IVD必经之路 - 磁珠×单分子检测平台

化学发光诊断的极限在哪里?还可以进一步提高灵敏度吗? 随着疾病诊断和治疗方案的不断进步,也对检测的精度提出了新的需求,单分子诊断随之应运而生。

2021-09-22 课时:49分钟