RETINAL
\ɹˈɛtɪnə͡l], \ɹˈɛtɪnəl], \ɹ_ˈɛ_t_ɪ_n_əl]\
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By Princeton University
By DataStellar Co., Ltd
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A carotenoid constituent of visual pigments. It is the oxidized form of retinol which functions as the active component of the visual cycle. It is bound to the protein opsin forming the complex rhodopsin. When stimulated by visible light, the retinal component of the rhodopsin complex undergoes isomerization at the 11-position of the double bond to the cis-form; this is reversed in "dark" reactions to return to the native trans-configuration.
By DataStellar Co., Ltd
By Robley Dunglison
Word of the day
Elizabeth Sara Sheppard
- An English novelist; born at Blackheath, 1830; died Brixton, March 13, 1862. She wrote noted "Charles Auchester"(1853), mystical art novel; "Counterparts, or the Cross of Love"(1854); "My First Season"(1855); "The Double Coronet"(1856); "Rumor", a musical and artistic novel(1858).