Rxivist combines preprints from bioRxiv with data from Twitter to help you find the papers being discussed in your field. Currently indexing 57,793 bioRxiv papers from 266,023 authors.
Nuclear pores as versatile reference standards for quantitative superresolution microscopy
Jervis Vermal Thevathasan,
Sudheer Kumar Peneti,
Krishna Chaitanya Kasuba,
Sarah Janice Hoerner,
Pedro Matos Pereira,
Vilma Jimenez Sabinina,
Posted 20 Mar 2019
bioRxiv DOI: 10.1101/582668
Posted 20 Mar 2019
Quantitative fluorescence and superresolution microscopy are often limited by insufficient data quality or artifacts. In this context, it is essential to have biologically relevant control samples to benchmark and optimize the quality of microscopes, labels and imaging conditions. Here we exploit the stereotypic arrangement of proteins in the nuclear pore complex as in situ reference structures, to characterize the performance of a variety of microscopy modalities. We created four genome edited cell lines in which we endogenously labeled the nucleoporin Nup96 with mEGFP, SNAP-tag or HaloTag or the photoconvertible fluorescent protein mMaple. We demonstrate their use a) as 3D resolution standards for calibration and quality control, b) to quantify absolute labeling efficiencies and c) as precise reference standards for molecular counting. These cell lines will enable the broad community to assess the quality of their microscopes and labels and to perform quantitative, absolute measurements.
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