FIG. 18. Electron micrograph of lateral wall of the rhizoid of a 48-hour-old embryo
of Fucus vesiculosus. Shows abundant Golgi bodies and vesicles derived therefrom.
The latter are believed to contribute to the cell wall. (Courtesy of Dr. B. Bouck.)
A particle's eleetrophoretic mobility in a given medium depends upon
its surface charge density and its shape but not upon its radius, r, while
its diffusion constant depends in the same w a y upon its shape but is
proportional to its radius. Hence the ratio m/D will vary with 1/r. Its
320
L I O N E L F . J A F F E
of Fucus vesiculosus. Shows abundant Golgi bodies and vesicles derived therefrom.
The latter are believed to contribute to the cell wall. (Courtesy of Dr. B. Bouck.)
A particle's eleetrophoretic mobility in a given medium depends upon
its surface charge density and its shape but not upon its radius, r, while
its diffusion constant depends in the same w a y upon its shape but is
proportional to its radius. Hence the ratio m/D will vary with 1/r. Its
320
L I O N E L F . J A F F E