Abstract
Comparative ultrastructural investigations of the Physarum polycephalum intramembrane particles in the plasma membrane at different stages of the cycle has provided valuable information in relation to possible changes that occur in the plasma membrane of higher organisms. In addition, it gives insight on how plasma membrane changes correlate with gene expression and gene regulation in eukaryotes. In this report Freeze-fracture-etched techniques were utilized to study the arrangements of intramembrane particles (IMP) distribution and density at eight hours of the naturally synchronous plasmodial stage.
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