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Fig. 15: macronucleus with heterochromatin and nucleoli

Macronucleus of Colpes hirtus. Heterochromatin and nucleoli are seen as smaller and larger stained bodies, respectively, in the macronucleus. Many nuclear pores exist in the nuclear envelope. EM taken on 5/23/69 by R. Allen with Philips 300 TEM. Neg. 7,650X. Bar = 1µm.
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