Genetic dissection of the photoreceptor system in the compound eye of <i>Drosophila melanogaster</i>
Description
<jats:p>1. Three mutations which eliminate specific types of photoreceptors in <jats:italic>Drosophila</jats:italic> were characterized.</jats:p><jats:p>2. Of the eight photoreceptors in each facet, two mutations delete the outer six (R 1‐6). The third eliminates R 7, one of the two central photoreceptors. Double mutants can be constructed in which only photoreceptor R 8 is present.</jats:p><jats:p>3. The spectral sensitivities, photopigments, and behavioural properties of these mutants were investigated.</jats:p><jats:p>4. R 1‐6 have two sensitivity peaks, near 350 and 470 nm. These receptors contain a rhodopsin with these absorption peaks. It interconverts with a metarhodopsin that absorbs around 570 nm.</jats:p><jats:p>5. R 7 is a U.V.‐receptor, containing rhodopsin that absorbs around 370 nm and interconverts with a metarhodopsin which absorbs around 470 nm.</jats:p><jats:p>6. R 8 is a non‐adapting blue‐receptor with a third type of rhodopsin.</jats:p><jats:p>7. The properties of these photopigments explain the different sensitivities and spectral adaptation phenomena of the various photoreceptors.</jats:p><jats:p>8. All the photoreceptors have input into phototaxis. Spectral analysis of this behaviour provides evidence for integration of the input from the different photoreceptors.</jats:p>
Journal
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- The Journal of Physiology
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The Journal of Physiology 256 (2), 415-439, 1976-04
Wiley
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Details 詳細情報について
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- CRID
- 1360855570804372736
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- ISSN
- 14697793
- 00223751
- http://id.crossref.org/issn/00223751
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- Data Source
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- Crossref