Peroxisomes in inner adrenocortical cells of fetal and adult guinea pigs
- PMID: 4633170
- PMCID: PMC2108982
- DOI: 10.1083/jcb.57.2.345
Peroxisomes in inner adrenocortical cells of fetal and adult guinea pigs
Abstract
Abundant membrane-bounded granules, 0.1-0.45 microm in diameter, occur among the elements of the smooth-surfaced endoplasmic reticulum in zona fasciculata and zona reticularis adrenocortical cells of guinea pigs. Acid phosphatase cannot be cytochemically demonstrated in them, and they are therefore distinct from lysosomes. Incubation in medium containing 3,3'-diaminobenzidine results in dense staining of the granules, identifying them as peroxisomes. These small peroxisomes increase in number as fetal adrenocortical cells differentiate, and they appear to arise from dilated regions of endoplasmic reticulum. They maintain interconnections with the smooth endoplasmic reticulum and with one another.
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