CMB 311 Lecture Notes - Lecture 11: Zeaxanthin, Pigment, Pyrrole
26 Jan 2019
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Document Summary
Retinal (vitamin a) is used by animals for vision. Composed of 4 units of molecules related to pyrrole. Aminolevulinic acid, uroporphyrinogen iii, protoporphyrin ix, heme. Pigment colors result from reflection of light in the visisble sprecturm; due to conjugated structures, alternating double and single bonds. 6co2 + 6h2o ---> c6h12o6 + 6o2. Light dependent reactions: nadph and atp are produced. Light-independent reactions (aka calvin cycle): atp and nadph provide energy and reducing power for the fixation of co2. Autotrophs can synthesize chemical fuels such as glucose from co2 and. H2o by using sunlight as an energy source. All the carbon, atp, everything comes from co2. H2o is the electron donor for photosynthesis. The energy of a photon increases with decreasing wavelength and is given by: Bacteria: granules bounded to the plasma membrane. Grana ; sites of light -dependent reactions. Strome ; sites of light independent reactions. Tetrapyrroles with a structure similar to the heme group.
