Elektronenmikroskopisch-zytochemische Untersuchungen an Zellmembranen der Hornzellen vom Vormagenepithel der Ziege*

Ultrahistochemical studies on the plasma membrane of stratum corneum cells in the proventricular epithelium of the goat Using ultrahistochemical methods carbohydrate-rich substances and SH-groups could be localized on the plasma membrane of stratum corneum cells in the proventricular epithelium of the goat. SH-groups were present only on the inner lamella of the plasma membrane while mucosubstances were present on both sides. The functional significance of both these substances is still not understood, especially whether they take part in the specific transport mechanism present in the proventricular epithelium.