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Fig. 4: nuclei with pores and nucleoli in the macronucleus

Halteria has a micronucleus (mic) and macronucleus (mac). A large nucleolus (no) is shown in the macronucleus along with many heterochromatin bodies. Pores (nep) are present in the nuclear envelope. EM taken on 3/12/71 by R. Allen with Hitachi HU11A TEM. Neg. 13,750X. Bar = 0.5µm.
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