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Fig. 6. Internalization of the apical membrane in mitochondria-rich cells (MRCs).
Yolk-sac MRCs were double-labeled by Na+/K+-ATPase
antiserum (second antibody conjugated with FITC; green) and
Con-ATexas-Red (red), which was internalized into the cytoplasm of MRCs
(A). (B,C) Optical sections 3 µm and 6 µm beneath the apical surface.
Magnification: 2000x. Scale bars: 15 µm.