. The biosynthesis of proteins. Proteins -- Synthesis. 0—CHj Hexose-pentose. Hexose ORd (Mouve] ORD (Blue) Fig. 6. Chemical structure of pigments from four Streptocarpus varieties, and corresponding genotypes (after Lawrence, 1950). Brilliant studies by Beadle and Ephrussi on the development of the eye pigments of Drosophila provided further information on the genetic control of anabolic processes. The dark red colour of wild type eyes is due to the presence of two types of coloured granules, red and brown, in the pigment cells which surround the ommatidia. A series of mutants (vermilion cinna
. The biosynthesis of proteins. Proteins -- Synthesis. 0—CHj Hexose-pentose. Hexose ORd (Mouve] ORD (Blue) Fig. 6. Chemical structure of pigments from four Streptocarpus varieties, and corresponding genotypes (after Lawrence, 1950). Brilliant studies by Beadle and Ephrussi on the development of the eye pigments of Drosophila provided further information on the genetic control of anabolic processes. The dark red colour of wild type eyes is due to the presence of two types of coloured granules, red and brown, in the pigment cells which surround the ommatidia. A series of mutants (vermilion cinnabar, scarlet) which have various tinges of bright red eyes are deficient in the brown pigment. Ephrussi and Beadle (1935, 1937) transplanted eye disks of vcrmihon or cinnabar larvae into the abdomen of wild type larvae and they observed that the mutant eye disks developed into adult struc- tures with wild type pigmentation. The lymph of wild type flies therefore proMdcd the mutant eye disks with substances which they did not contain. 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 Chantrenne, H. Oxford, New York, Pergamon Press
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