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[Histochemistry of neurosecretory cells in the cerebral ganglion of the adult or juvenile sweet water crab, Potamon magnum magnum (Pretzman)].

The histochemistry of the neurosecretory material of the PF-positive neurosecretory cells of the cerebral ganglion of the adult and juvenile crab, Potamon magnum magnum (Pretzman) has been investigated. The PF-positive neurosecretory material is proteinaceous and contains considerable amounts of cystine; it is associated with significant amount of cytoplasmic RNA, lipids and phospholipids and with moderate amounts of carbohydrates, though no glycogen could be detected. The significance of these results is discussed.