Electron microscopy of C-particles and small vesicles in a transplantable rat ascites hepatoma-66F

Transplantable rat ascites hepatoma AH-66F was examined by an electron microscope. C-particles were numerously observed in the intercellular spaces and on the cell surface. The size of these particles varied from 90 to 200 nm in diameter. Small vesicles were also observed. These vesicles ranged from 40 to 50 nm in diameter. Most of them were located near the group of C-particles. Occasionally, small vesicles were observed in the form of a rosette around the C-particles.