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The Journal of Cell Biology, Vol 45, 118-129, Copyright © 1970 by Rockefeller University Press

ARTICLE

NEW OBSERVATIONS ON MICROBODIES : A Cytochemical Study on CPIB-Treated Rat Liver



Peter G. Legg 1 and Richard L. Wood 1

1 From the Department of Anatomy, University of Minnesota, Minneapolis, Minnesota 55455

The liver of male rats has been studied after CPIB stimulation by using the peroxidase reaction for localizing catalase in hepatic cells. CPIB administration leads to an increase in the number of microbodies, and it is suggested that one mechanism by which microbody proliferation occurs is a process of fragmentation or budding from preexisting microbodies. Reaction product was observed not only within the microbody matrix, but outside the limiting membrane of the microbody and in association with ribosomes of adjacent rough endoplasmic reticulum. This localization of reaction product is interpreted as evidence that catalase after synthesis on rough endoplasmic reticulum may accumulate near microbodies and may be transferred directly into these organelles without traversing the cisternae of the endoplasmic reticulum or Golgi apparatus.

Submitted on August 21, 1969
Revised on October 10, 1969


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