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Science. 1975 Mar 14;187(4180):953-5.

Disc shedding in rodlike and conelike photoreceptors of tree squirrels.

Abstract

Electron microscopic observations suggest that the rodlike and conelike photoreceptors of diurnal tree squirrels shed outer segment discs. Twenty-four hours after injection of triated L-leucine, the rodlike photoreceptors show a band of radioactivity at the base of the outer segment. The conelike photoreceptor outer segments show only a pattern of diffuse labeling. These results strongly suggest that disc shedding can occur in photoreceptor outer segments in which proteins are diffusely renewed.

PMID:
1145180
[Indexed for MEDLINE]
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