Optogenetics and the 2026 Nobel Prize in Physiology or Medicine
Quick dive
- Karl Deisseroth, Peter Hegemann and Georg Nagel received the 2026 Nobel Prize in Physiology or Medicine for work leading to optogenetics.
- The method uses light-sensitive proteins to activate or inhibit selected nerve cells with high temporal and spatial precision.
- Hegemann and Nagel identified channelrhodopsins in the alga Chlamydomonas, including a channel that opens in about 0.2 milliseconds.
- Deisseroth’s group demonstrated control of specific neurons in live mice through light delivered by a slender fibre-optic cable.
- exam_relevance: tests channelrhodopsin, ion flow, membrane excitation and the translation from algal photoreceptors to neural-circuit experiments, a concrete biology application rather than generic Nobel news.
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