Zechmeister, L. and Escue, R. B. (1942) Isolation of prolycopene and pro-γ-carotene from Evonymus fortunei. Journal of Biological Chemistry, 144 (2). pp. 321-323. ISSN 0021-9258 http://resolver.caltech.edu/CaltechAUTHORS:ZECjbc42b
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It has been reported (1) that the ripe seeds of Evonymus europaeus L. (Celastraceae) contain unesterified zeaxanthin, C40H56O2, as the main polyene pigment. The same statement is valid for Evonymus fortunei, var. color., Rehd., commonly termed “winter-creeper euonymus,” from 1 kilo of which 1300 mg. of zeaxanthin were isolated. Upon evaporation of its saponified ether extract and addition of petroleum ether, abundant quantities of zeaxanthin crystallize. This paper describes an investigation of some of the pigments (about 200 mg. per kilo, of which one-fourth is β-carotene) which remain in the mother liquor. The mixture can be resolved by chromatographic analysis. In addition to some twenty less interesting pigments, two representatives of a stereochemically new class of natural carotenoids (2) were separated; viz., prolycopene, C40H56, and pro-γ-carotene, C40H66. The yields of pure crystals were 11 mg. and 0.5 mg. per kilo of seeds respectively. Hence, Evonymus fortunei may serve as a source of prolycopene while it does not offer any larger yield of pro-γ-carotene than does the fruit of Butia capitata (3). According to the foregoing paper (4) Pyracantha angustifolia is the best starting material for the isolation of pro-γ-carotene at the present time.
|Additional Information:||Copyright © 1942 by the American Society for Biochemistry and Molecular Biology. (Received for publication, April 13, 1942) We wish to thank Mr. F.W. Westcourt of the Texas State College for Women for the identification of the plant, and Dr. G. Oppenheimer and Mr. G. Swinehart for a microanalysis. Gates and Crellin Laboratories of Chemistry, Contribution No. 881.|
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|Deposited On:||12 Jun 2008|
|Last Modified:||26 Dec 2012 10:05|
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