Phycobilisome
Phycobilisomes are large protein complexes that cyanobacteria , red algae , glaucophyceae and cyanelles use in photosynthesis . Their absorbing antenna pigments , which, unlike chlorophyll, absorb green and yellow light, conduct the energy to the reaction centers of photosystem II in photosynthesis.
The phycobilisomes are located in the cytosol on the thylakoid membrane and guide the captured light energy to the reaction centers of photosystem II. In contrast to other antenna complexes containing chlorophyll and carotenoid, they are water-soluble. Algae with phycobilisomes use the so-called green gap , i. H. Wavelengths in the green / yellow range, this enables them to colonize greater water depths.
The phycobilisomes are stacked in several roll-like stacks with a size of 32 * 48 nanometers . The red phycoerythrin is on the outside and the blue phycocyanin is on the inside on the light blue allophycocyanin. They are attached to the cytosolic side of the thylakoid membrane .
literature
- Karl-Heinz Linne von Berg, Michael Melkonian u. a .: The Kosmos algae guide. The most important freshwater algae under the microscope. Kosmos, Stuttgart 2004, ISBN 3-440-09719-6 , p. 298ff.