Appearance of EPCs after 3 hour of HDL-HRP internalization.

<p><b>A</b>) The population of positively stained endosomal vesicles increase and could be observed throughout the cytoplasm. Positive MVBs (MVB) in various sizes and shapes with tubular membranous extensions as well as prominent Golgi stacks (G) are visible. <b>B</b>) This figure shows the appearance of a tubular endosome. <b>C</b>) Arrows point to an endosome alignment forming “strings of pearl-like structures” (arrowheads). <b>D</b>) A large secondary lysosome shows intraluminal HDL-HRP particles. <b>E</b>) Numerous autophagosomes (white thick arrows) with included endosomal vesicles are noted. (Scale bar: A, D, E = 1 µm; B, C = 0.5 µm).