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| Description: Top: Some of the microorganisms from which opsins are obtained. Middle Diiferent opsins are sensitive to ditferent wavelengths of Light. resulting in the opening of sodium (Na') channels or the activation of chloride (Ct) pumps Bottom The relative response of each of the opsins to ditferent wavelengths of light. \, O Microbe Q) Wavelength 470 nm 535 nm 589 nm 539 nm lnanorneters) 6 Channel 6 ohm channelrhodopsln vonm channeivhodopsin ann halorhodopsln allows positive sodium responds to some regulates the llow ol ions to pass in reeponse wavelengths otgveen and negative chloride ions in to blue light. yellow light. response to yellow light. cnaz vcnm NpHR 1.0 _ 0.5 Relative response 0 5 to light 0.4 0.2 0-0 I I I l I 400 450 500 550 500 660 Wavelength (nm)
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