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- W2058082904 abstract "Sequencing the transcriptomes of more than 100 species of alga yields new channelrhodopsins with promising properties for optogenetics. A far red–shifted channelrhodopsin, Chrimson, opens up new behavioral capabilities in Drosophila, and alongside a fast yet light-sensitive blue channelrhodopsin, Chronos, enables independent excitation of two neuronal populations in brain slices. Optogenetic tools enable examination of how specific cell types contribute to brain circuit functions. A long-standing question is whether it is possible to independently activate two distinct neural populations in mammalian brain tissue. Such a capability would enable the study of how different synapses or pathways interact to encode information in the brain. Here we describe two channelrhodopsins, Chronos and Chrimson, discovered through sequencing and physiological characterization of opsins from over 100 species of alga. Chrimson's excitation spectrum is red shifted by 45 nm relative to previous channelrhodopsins and can enable experiments in which red light is preferred. We show minimal visual system–mediated behavioral interference when using Chrimson in neurobehavioral studies in Drosophila melanogaster. Chronos has faster kinetics than previous channelrhodopsins yet is effectively more light sensitive. Together these two reagents enable two-color activation of neural spiking and downstream synaptic transmission in independent neural populations without detectable cross-talk in mouse brain slice." @default.
- W2058082904 created "2016-06-24" @default.
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- W2058082904 date "2014-02-09" @default.
- W2058082904 modified "2023-10-15" @default.
- W2058082904 title "Independent optical excitation of distinct neural populations" @default.
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- W2058082904 doi "https://doi.org/10.1038/nmeth.2836" @default.
- W2058082904 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3943671" @default.
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