Lectin-like components in the macronuclear replication bands of Euplotes eurystomus.

Upon incubation with fluoresceinylated neoglycoproteins, isolated macronuclei from the ciliated protozoan Euplotes eurystomus display different labelling patterns depending on the nature of the sugar bound to the neoglycoproteins. Specific sugar-binding components (i.e.

Replication bands and nucleoli in the macronucleus of Euplotes eurystomus: an ultrastructural and cytochemical study.

The principal structural compartments of the macronucleus of Euplotes eurystomus were examined by ultrastructural and cytochemical procedures. Interphase chromatin is condensed in highly compact granules that stain intensely with the DNA-specific osmium-amine procedure. Nucleoli react strongly with silver and with thiol-specific reagents, but are almost completely unstained by osmium-amine.