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By HRSEM, intercellular canaliculi of serous acini show a few holes (arrows) and numerous microbuds (arrowheads). In the cytoplasmic aspect of the canaliculi membrane there are a few protrusions (asterisks) related to TEM Ω shape profiles. (A) Pentagastrin 130 μm stimulation; (B) pentagastrin 65 μm; (C) pentagastrin 26 μm. Bar: 1 μm.
