DON W. FAWCETT / SCIENCE PHOTO LIBRARY DON W. FAWCETT / SCIENCE PHOTO LIBRARY
Transmission electron micrograph of a freeze-fractured gap junction, which connects the cytoplasm of two cells, allowing molecules and ions to pass freely. The bottom portion of the image shows the unspecialized area of P-face. The middle is dominated by the gap junction specialized area of P-face. The E-face of the gap junction is shown at the top of the image. Enhancement of 9C2778.
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