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A Bright, Nontoxic, and Non-aggregating red Fluorescent Protein for Long-Term Labeling of Fine Structures in Neurons. Frontiers in cell and developmental biology Ning, L., Geng, Y., Lovett-Barron, M., Niu, X., Deng, M., Wang, L., Ataie, N., Sens, A., Ng, H., Chen, S., Deisseroth, K., Lin, M. Z., Chu, J. 2022; 10: 893468

Abstract

Red fluorescent proteins are useful as morphological markers in neurons, often complementing green fluorescent protein-based probes of neuronal activity. However, commonly used red fluorescent proteins show aggregation and toxicity in neurons or are dim. We report the engineering of a bright red fluorescent protein, Crimson, that enables long-term morphological labeling of neurons without aggregation or toxicity. Crimson is similar to mCherry and mKate2 in fluorescence spectra but is 100 and 28% greater in molecular brightness, respectively. We used a membrane-localized Crimson-CAAX to label thin neurites, dendritic spines and filopodia, enhancing detection of these small structures compared to cytosolic markers.

View details for DOI 10.3389/fcell.2022.893468

View details for PubMedID 35846353