ChromoBlog

What is one-step immunostaining?

Posted by Dr. Astrid Sitte on Jul 26, 2019 2:45:28 PM

Simultaneous immunostaining, also called one-step immunostaining vs. sequential immunostaining. Nano-Secondaries stain different primary antibodies equally well in one-step staining and sequential staining.

HeLa cells were immunostained with different primary antibodies and Nano-Secondaries Alexa Fluor® 647 (1:1,000, magenta). Cell nuclei were stained with DAPI (blue). Scale bar, 20 μm.

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Topics: live cell imaging, Secondary antibody, Nano-Secondaries, One-step immunostaining, staining

Visualize Histones in live cells: Histone-Chromobody

Posted by Christoph Eckert on Aug 3, 2017 1:22:32 PM

The ChromoTek Histone-Chromobody®* is a novel probe to visualize endogenous histone H2A-H2B heterodimer in live cells:

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Topics: live cell imaging, Histone Chromobody, live cell microscopy, Nucleosome, Chromatin Marker, Histone

Actin Chromobody: Visualization of actin dynamics – NOT alteration

Posted by Christoph Eckert on Feb 20, 2017 1:21:56 PM

Everybody really wants to use a detection probe that does not influence its target. For measurement of actin and actin-related functions there are a number of actin visualization probes and techniques available that researchers can select. Hence, one should only apply such actin visualization probes, which do not alter actin dynamics. How do the actin probes for visualization perform? Which probes do interfere with function and which probes do not? Robert Grosse and his team from the Institute of Pharmacology at the Biochemical-Pharmacological Center (BPC), University of Marburg, Germany took the effort and systematically looked into detection technologies of actin filaments in order to avoid potential pitfalls. In the recently published mini review/poster “Actin Visualization at a Glance” (Melak et al. 2017) they have discussed the pros and cons of current probes to visualize actin filaments, i.e. Phalloidin, LifeAct, Utrophin, F-tractin, SiR-actin, GFP-actin, tagged actin, and Actin Chromobody® (see table 1 and figure 1 below). 

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Topics: Chromobodies, Actin Chromobody, cytoskeleton, Actin, live cell imaging

Novel cell cycle modulators identified using the Cell Cycle Chromobody Technology

Posted by Larisa Yurlova on Jun 6, 2016 5:25:06 PM

Cell cycle and cell proliferation are tightly controlled cellular processes, and their deregulation is a hallmark of cancer. To enable non-invasive analysis of cell cycle in living cells, ChromoTek developed a Cell Cycle Chromobody. The Cell Cycle Chromobody (CCC) consists of a binding domain of a heavy-chain antibody highly specific against human proliferating cell nuclear antigen (PCNA), which is genetically fused to a fluorescent protein.

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Topics: Cell Cycle Chromobody, Chromobody, live cell imaging

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