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Uptake of DiI-Ac-LDL by endothelial cells from aortic arches of 10-day-old embryos, (a, b) Phase and fluorescence micrographs of a 30-µm-thick Vibratome section of an aortic arch which was perfused with DiI-Ac-LDL by administration of the DiI probe to the heart; (c, d) phase and fluorescence micrographs of 1-day-old culture exposed to the DiI probe for 4 hr; (e, f) as in c and d, respectively, but cultures were 6 days old. Bar = 30 µm.
