Microtubule reassembly-interactions between microtubules and pore complexes, endoplasmic reticulum and 100 A filaments in tumour cells in vitro.

100 A filaments and annulate lamellae were often observed in the vicinity of vinblastine-induced paracrystals in tumour cells treated with nocodazole. There was often a direct continuity between 100 A filaments and paracrystals. The assembly of microtubules was examined in nocodazole-treated cells with special attention to possible initiating sites. We found an apparent association of microtubules with pore like structures associated with the endoplasmic reticulum. A complex system of 100 A filaments, microtubules and endoplasmic reticulum was observed. The significance of these results is discussed.