Abstract
In the photoreceptor cells of the compound eye of the fly pigment granules migrate under the influence of a change in light intensity (1). The light flux in the cell’s rhabdomere, which contains the visual pigment molecules and functions as a light guide, depends on the number of pigment granules present near the rhabdomere. This number of absorbing and scattering granules is small in the dark adapted state and increases with light adaptation. To describe this pupil mechanism we have proposed an electrophoresis model (2) in which the force exerted on the pigment granules is a consequence of the change in membrane potential following rhodopsin conversion. We present here results of more extensive studies on rhodopsin conversion processes and closely related properties of the pigment granules.
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Stavenga, D.G., Zantema, A., Kuiper, J.W. (1973). Rhodopsin Processes and the Function of the Pupil Mechanism in Flies. In: Langer, H. (eds) Biochemistry and Physiology of Visual Pigments. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85769-0_20
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DOI: https://doi.org/10.1007/978-3-642-85769-0_20
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