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last updated: December 9, 2024
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As a protein biochemist and a Ph.D. student, I was given the task to express a eukaryotic protein in a bacterial system. And to say that I was having a hard time would be an understatement. It took me many PCRs, cloning and transformations to get to the right construct that would eventually express the desired…
ELISA (Enzyme-Linked Immunosorbent Assay) is the heartbeat of many labs in the research world, owing to its simplicity and its ability to answer a very basic question: how much of protein/peptide/antibody is in my sample? More specifically, it can be used to answer such questions as: The questions go on and on. If you want…
Commonly, no one thinks much about how the surfaces of labware (like microcentrifuge tubes, test tubes, dishes, etc.) can affect experimental results. We might know when we need to use glass versus plastic. Or we might know that certain chemicals, like chloroform, will interact with some plastic polymers, and you must use polymers that are…
Radioactivity is still the most sensitive detection mechanism for many macromolecules and enzymatic activities. In graduate school, I performed countless radioactive kinase assays, watching the radioactive gamma 32P of ATP get transferred to my autophosphorylating receptor of interest, and then separating my protein from free hot ATP on a gel. The gel is dried, covered…
Western blots can be ugly. I mean down-right, horrifically, wall-of-shame ugly. Not only can they be embarrassing to show to your colleagues, but the ugliness can obscure your results, making it impossible to interpret your data. Blotting consists of many experimental steps, which makes the technique naturally error-prone. Although standardized protocols exist, many fail to…
In this article, you will be introduced to the world of fluorescent western blotting. Firstly, we will compare fluorescent and chemiluminescent western blotting. Then, we will learn how infrared fluorescent western blotting can give you truly quantitative and reproducible results. Lastly, we’ll look at the many advantages of fluorescent western blotting, including the possibility to multiplex. Importantly,…
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