Secretory Granules within a Human Eosinophil

Transmission Electron Microscopy: Morphology of secretory granules within a human eosinophil after physiological stimulation with eotaxin showing a mixed population of intact (arrowhead) and enlarged emptying granules (gr) with reduced electron-density in the cytoplasm. Scale bar = 630 nm.

Courtesy of Rossana Melo, Ann Dvorak and Peter Weller, Department of Biology, Federal University of Juiz de Fora, Brazil.