Controlling the Cell Cycle: AnapHase Onset - David O. Morgan
本视频由科普中国和生物医学大讲堂出品
David O. Morgan (UCSF) Part 3: Controlling the Cell Cycle: AnapHase Onset
In the anapHase stage of the cell cycle, the duplicated chromosomes are pulled apart by a machine called the mitotic spindle, resulting in the distribution of a complete set of chromosomes to each of the daughter cells. In the third part of this lecture, I describe the combination of biochemistry and microscopy in my laboratory that led to the discovery of a regulatory switch that triggers the abrupt and synchronous separation of the chromosomes at the onset of anapHase.
pHotoreceptors and Image Processing Part 1A - Jeremy Nathans
本视频由科普中国和生物医学大讲堂出品
Jeremy Nathans (Johns Hopkins) Part 1A: pHotoreceptors and Image Processing
In this set of lectures, Jeremy Nathans explores the molecular mechanisms within the retina that mediate the first steps in vision. The first lecture focuses on the structure of the light sensing receptors, the intracellular signals that are triggered by light absorption, and the ways in which the retina extracts information from a complex scene. See more at http://www.ibioseminars.org
pHotoreceptors and Image Processing Part 1B - Jeremy Nathans
本视频由科普中国和生物医学大讲堂出品
Jeremy Nathans (Johns Hopkins) Part 1B: pHotoreceptors and Image Processing
In this set of lectures, Jeremy Nathans explores the molecular mechanisms within the retina that mediate the first steps in vision. The first lecture focuses on the structure of the light sensing receptors, the intracellular signals that are triggered by light absorption, and the ways in which the retina extracts information from a complex scene. See more at http://www.ibioseminars.org
Stability of MorpHogen Gradients & Movement of Molecules
In my second lecture I describe experiments using EGFP tagged Bicoid to follow Bcd gradient establishment in living embryos, and to test various aspects of the simple model. Despite continuous synthesis of new Bcd protein at the anterior end of the egg, we find that the concentration of Bcd in nuclei at any given point along the anterior posterior axis is constant over time and is reproducible from embryo to the next. This reproducibility means that the gradient is sufficiently robust to provide positional information and thus can accurately direct gene activities. One the other hand, quantitative imaging experiments point to several features of the gradient that are hard to explain - how target genes activated by Bcd distinguish relatively subtle differences in low concentrations, and how Bcd molecules move from the anterior site of their synthesis to the site of their transcriptional activity. See more at http://www.ibioseminars.org
Introducing the Opera pHenix™ High Content Screening System
Introducing Opera pHenix™, a next-generation, confocal, high content screening system designed for high-throughput, pHenotypic screening and assays using complex disease models, such as primary cells and microtissues. Find out more at http://bit.ly/1eZM4Ok.
掌控pHospHo-Flow： 巧用细胞内、外流式细胞术优化免疫细胞活化分析
Since its first use in 1950s, flow cytometry has become one of the mostly powerful analysis techniques in biomedical research and clinical use to rapidly and simultaneously scrutinize multiple parameters at the single-cell level determined. Besides the use of best possible antibodies, an appropriate fixation and permeabilization protocol play critical roles in achieving successful detections from surface CD markers to intercellular modified targets such as pHospHorylated proteins. This presentation, as a guideline, will share with you those important tips that CST flow-cytometry experts routinely use in their daily bench work. 自从流式细胞术在20世纪50年代首次应用以来，它已成为生物医学研究和临床应用中最有力的分析技术之一，以便在单细胞水平上快速且同时检测多个参数。除了使用经严格验证优化的抗体外，适当的固定和通透方案对于从细胞表面CD marker到细胞内修饰靶标（如磷酸化蛋白）的成功检测起着关键作用。作为指导方针，本次讲座将与您分享CST流式细胞术专家在日常的试验工作中经常使用的经验和技巧。
从AlpHa到Omicron，从疫苗到中和抗体的影响——新冠试剂研发与全球应用范例分享
近期一个新冠突变株B.1.1.529刷屏了全世界，一个陌生的词汇“奥密克戎”出现在了大众视野。“新冠最强突变”、“30多种突变”、“传播性狂增500%”、“疫苗中和活性下降 ...