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last updated: January 14, 2020
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Multi-parameter data acquisition is key to the modern era of science research. I, for one, wish every single experiment that I design would give me the maximum amount of information. For example, in cell biology and immunology, we want to capture as much information (be it cytokines/hormones/chemokines) as possible about a given cell population. Of…
After panel design, and titration of the reagents, the next most important step in flow cytometry is setting the proper voltages on the photomultipler tubes (PMTs). These detectors take the photons of light emitted by the fluorochromes on the cells and convert them to electrons, which ultimately become the voltage current that is digitized and…
Cytokines, those small proteins that modulate immune cell responses, once translated are normally secreted rapidly out of the cell. So, previously we could only check the levels of cytokines secreted in the supernatant, but we wouldn’t know which cell was producing which cytokine. But what if we had a way to keep the cytokines inside the cell? Then we…
One of the key characteristics of cytotoxic cells (i.e. CD8+ T cells, natural killer cells) is the presence of pre-formed cytoplasmic lysosomal granules. These structures house perforin and granzyme; two molecules that are essential for the lysis of target cells. Upon effector cell activation, granules are polarized toward the target cell and the contents are…
As science is becoming more interdisciplinary, the tools we use to answer questions are also crossing party lines. Case in point: flow cytometry. Once a tool only used by “real” immunologists, flow cytometry is fast becoming a method by which numerous questions can be answered, from the length of a cell’s telomeres, to the state…
Fortunately for microscopy users, measuring intracellular fluorescence has been made relatively simple through an ImageJ plugin called the Cell Magic Wand. For those of you unfamiliar with ImageJ, it’s a popular image processing program that runs on Mac, Windows, and Linux. How to use ImageJ for measuring intracellular fluorescence First of all, to begin measuring…
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