1. One macronucleus, elliptical in shape.

2. One elongated macronucleus and one micronucleus.

3. Macronucleus twisted band-shaped, longitudinally oriented in zooid.

4. Macronucleus highly variable, either single and band-like or comprising 2–65 (mostly 2–10) spherical nodules.

5. These facts implied that the choice expressing macronucleus genes of the resting cyst and the vegetative cell in Tachysoma pellionella are similar to a high degree but both had some variances.

6. We also observed that the macronuclear DNA content may be adjusted by another way, i. e. by extrusion of excess nuclear material of the macronucleus.

7. So do the resting cyst and the vegetative cell macronucleus genes in Euplotes encysticus.

8. The other protein reacts with anti-lamin B antibody and is situated in the macronucleus.