. Currents in biochemical research, 1956; twenty-seven essays charting the present course of biochemical research and considering the intimate relationship of biochemistry to medicine, physiology, and biology. Biochemistry -- Research. CHEMICAL STRUCTURE is that of lanosterol, but in addition they possess the substituent at C24 which is typical of ergosterol. The acids isolated from the molds probably represent secondary oxidation products rather than metabolic intermediates; yet the disclosure of this structural type strongly suggests that the carbon skeleton of lanosterol can be enlarged by
. Currents in biochemical research, 1956; twenty-seven essays charting the present course of biochemical research and considering the intimate relationship of biochemistry to medicine, physiology, and biology. Biochemistry -- Research. CHEMICAL STRUCTURE is that of lanosterol, but in addition they possess the substituent at C24 which is typical of ergosterol. The acids isolated from the molds probably represent secondary oxidation products rather than metabolic intermediates; yet the disclosure of this structural type strongly suggests that the carbon skeleton of lanosterol can be enlarged by attachment of carbon atoms to the CH3 COOH 1 CHj CHj- COOH 1 CH2 -C-C-COOH 1 1 OH OH CHj- CH3- -C—C —COOH —*- VALINE OH OH 0 OH II 1 CH3-C-C- COOH CH3 CH2 -C—C-COOH .- ISOLEUCINE OH OH TATUM AND ADELBERG, 1951. C29 STEROLS (STIGMASTEROL, ETC ; POLYPORENIC A,ETC Cge STEROLS (ERGOSTEROL) Fig. 7. Postulated mechanism for the synthesis of ergosterol and plant sterols from lanosterol. aliphatic side chain. The carbon source for the alkyl substit- uents of the plant sterols (stigmasterol or sitosterol) and of ergosterol is obscure, but it is not unreasonable to presume that they are derived from acetate also. There exists one biochemi- cal process for the branching of carbon chains which may have some bearing on the synthesis of the C28 and G29 sterols. The amino acids valine and isoleucine are the /3-methyl and the 489. 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 Green, David Ezra, 1910-. New York, Interscience Publishers
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