Table II.

Density of Golgi stacks and mitochondria in the cortical cytoplasm during metaphase

LocationOrganelle Density
Golgi stacksMitochondria
μm−2
Overall0.09 ± 0.010.13 ± 0.02
Belt region0.17 ± 0.020.16 ± 0.03
Peripheral cortex0.06 ± 0.010.11 ± 0.02
Concentration in belt over periphery2.9 ± 0.31.5 ± 0.4

Individual stacks or mitochondria immediately underneath the plasma membrane were marked manually. Different regions of the cortical cytoplasm were identified by eye and outlined. Values are arithmetic means ± se (n = 3) and given in μm−2.