porphyropsin
American Heritage Dictionary:
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por·phy·rop·sin
(pôr'fə-rŏp'sĭn) 
n.
A purple pigment similar to rhodopsin, found in the rods of the retinas of freshwater fishes and certain frogs.
n.
A purple pigment similar to rhodopsin, found in the rods of the retinas of freshwater fishes and certain frogs.
[Greek porphurā, shellfish yielding purple dye, purple + OPSIN.]
Oxford Dictionary of Biochemistry:
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porphyropsin
a purple, light-sensitive, visual pigment in the rod cells of the retinas of freshwater and migratory fishes, and some amphibians, consisting of a rod-type opsin combined (as a Schiff's base) with 3,4-didehydro-11-cis-retinal. It has an absorption maximum at ~522 nm, and is analogous in function to rhodopsin in other vertebrates.
| porphyro+, porphyrinuria, porphyrinogen | |
| portable, portal, porter |
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American Heritage Dictionary
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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Oxford Dictionary of Biochemistry
Oxford University Press. Oxford Dictionary of Biochemistry and Molecular Biology © 1997, 2000, 2006 All rights reserved.
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