. Carotenoids, their comparative biochemistry. Carotenoids. CAROTENOIDS Karrer and Rutschman»«•' • isolated the acidic material and named it torularhodin (C37H48O2). It contains one carboxyl group and thus does not owe its acidic character to keto enol tautomerism. Further investigations showed that torularhodin had vitamin A activity and the following structure is suggested : * •. COOH Me Torularhodin i / / \ \ / / / / / \ \ \ \ \ \ / / / / / / / / / y • ^ \ \ \ —;/ • / / \ I 400 420 440 460 480 500 Wavelength (mfi) 520 540 Fig. 17.—TJie absorption spectra of (o) Torulene in hexane (b) The ac
. Carotenoids, their comparative biochemistry. Carotenoids. CAROTENOIDS Karrer and Rutschman»«•' • isolated the acidic material and named it torularhodin (C37H48O2). It contains one carboxyl group and thus does not owe its acidic character to keto enol tautomerism. Further investigations showed that torularhodin had vitamin A activity and the following structure is suggested : * •. COOH Me Torularhodin i / / \ \ / / / / / \ \ \ \ \ \ / / / / / / / / / y • ^ \ \ \ —;/ • / / \ I 400 420 440 460 480 500 Wavelength (mfi) 520 540 Fig. 17.—TJie absorption spectra of (o) Torulene in hexane (b) The acidic carotenoid present in Neurospora crassa, in light petroleum. (0) redrawn from Lederer, E. (1938) Bull Soc. Chim. Biol., 20, 554. (b) redrawn from Haxo, F. (1949) Arch. Biochem, 20, 400. Torularhodin was the main pigment present in Karrer's cultures and also the main component of the carotenoids extracted from R. sanniei by Fromageot and Tschang, *o who detected y-carotene and 106. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Goodwin, T. W. (Trevor Walworth). New York, Chemical Pub. Co.
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