among the principal ultrastructural changes in peroxisomes of male rat liver were ( a ) cavitation and compartmentalization of the matrix , often giving the appearance of a peroxisome-within-a-peroxisome , and ( b ) narrow , dense extensions of canaliculi or cisterns from the periphery of the peroxisome , forming partial circlets or surrounding irregular areas of cytoplasm .
C0752063
cisterns
C0010834
cytoplasm