Premium
Three‐Dimensional Structure of Macronuclei from Paramecium Determined by Scanning Electron Microscopy *
Author(s) -
CUMMINGS DONALD J.,
KOTASEK WILLIAM E.
Publication year - 1978
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1978.tb03899.x
Subject(s) - macronucleus , paramecium , chromatin , scanning electron microscope , microscopy , genome , ultrastructure , biology , electron microscope , optics , physics , genetics , ciliate , anatomy , microbiology and biotechnology , dna , gene
SYNOPSIS. Macronuclei of Paramecium primaurelia were isolated and examined by scanning electron microscopy. These nuclei consisted of a closely packed array of chromatin bodies measuring ∼ 0.2 μm in diameter. We estimated there were ∼ 30,000 such bodies/macronucleus, 20 times more than the number of unit genome equivalents. This suggests that a unit genome is physically shared by several chromatin bodies.