Elastin has been demonstrated in the wall of the retinal arteries in or immediately adjacent to the optic disc of adult Macaca mulatta using the immunogold labelling technique with delta-elastin antibody. Since elastin is thought to provide elasticity to the walls of these vessels, perhaps its presence in the retinal arteries plays a role in contractility and regulation of blood flow throughout the retinal vascular system.
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Sagaties et al. (1989) studied this question.
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