Biology 1002B Lecture Notes - Lecture 2: Optogenetics, Rhodopsin, Stereochemistry
31 May 2016
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Ribosomes produce nuclear proteins, some free in cell some in er. Light absorption : energy from photon goes into and becomes energy of electron, blue - ground state > higher excited state > lower excited state. Energy lost as heat: red ground state > lower excited state, fates. Lose energy as heat electron goes back down. Spit energy back out as a photon fluorescence. These competing processes don"t have fixed rates. Fluorescence energy used to produce light light. Photochemistry use light to drive a chemical change (oxidize something, change something chemically) Energy transfer transferring energy from one chloroplast to another: chlorophyll is green since green light doesn"t do anything in chlorophyll (only absorbs blue and red) Chlorophyll is green because there is no excited state for a green photon of light. Pigments are never free (chlorophyll is never floating around) What is the light actually doing to channelrhodopsin? (in eye spot: triggers phototransduction (in eye spot), causes flagella to move.
