THE ENTRY OF GRANULE-ASSOCIATED PEROXIDASE INTO THE PHAGOCYTIC VACUOLES OF EOSINOPHILS

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Abstract
The ultrastructural localization of peroxidase was studied in guinea pig eosinophils which had phagocytized zymosan or Escherichia coli. After phagocytosis, the membrane of the granule was joined to the membrane of the phagocytic vacuole, and the enzyme, which is ordinarily restricted to the matrix of the granule, was seen in the vacuole surrounding the ingested particle.