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| The mitotic macronucleus (mac) may be porous to microtubules. Segments of microtubules (arrowheads) are found both outside and inside the nuclear envelope in this figure although one cannot follow a single microtubule through the nuclear envelope. The section is immunogold labeled with anti-b-tubulin. EM taken on 7/5/96 by R. Allen with Zeiss 10A TEM. Neg. 12,000X. Bar = 0.5 µm. |
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