Cyanopsin

Cyanopsin (from Greek kyanos 'blue') is an outdated name for two different visual pigments:

• as cyanopsin the in the formerly pin occurring freshwater fish and many amphibians, cyan colored porphyropsin referred. The chromophore of this visual dye is 3,4-dehydro-11-cis- retinal ; the absorption maximum is between 620 nm for goldfish and 625 nm for carp , which means that the animals perceive light from the wide red range . Marine fish do not have this visual pigment. The correct name for the visual pigment is red-sensitive porphyropsin or L-porphyropsin .

• as cyanopsin , Ganopsin or photopsin III in the journal of the formerly human occurring violet -sensitive opsin referred dye. The chromophore is 11-cis retinal ; the absorption maximum is between 419 and 424 nm. The correct designation for the visual pigment is violet-sensitive opsin , S-iodopsin or S-photopsin .

Both visual pigments are used for color vision ; the three or four different dyes are localized in cones that are sensitive to different wavelengths of light. The pigments always have the same chromophore, but a different protein component ( opsin ).

See also

• Rhodopsin

Individual evidence

1. ^ Teresa K. Attwood , Richard Cammack: Oxford dictionary of biochemistry and molecular biology. 2nd Edition. Oxford University Press, 2006, ISBN 0-19-852917-1 , p. 156.
2. ^ Wilhelm Friedrich: Vitamins. Walter de Gruyter, 1988, ISBN 3-11-010244-7 , p. 118.
3. ↑ Gerhard Neuweiler, Gerhard Heldmaier: Comparative animal physiology . tape 1 : Neuro- and Sensory Physiology . Springer, Berlin / Heidelberg 2003, ISBN 3-540-44283-9 , pp. 463-466 .
4. ↑ University of Frankfurt : The Sehkaskade II (PDF, 4.7 MB) , script WS of 2006.
5. ↑ University of Augsburg : Photo reception and information processing in the eye ( Memento of the original from June 24, 2007 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , Seminar on May 28, 2002.