The lamellar substructure of osmiophilic inclusion bodies present in rat type II alveolar pneumonocytes

When rat pulmonary tissues are processed as outlined in this paper, the type II cell's surfactant containing osmiophilic inclusion bodies possess a periodic substructure. This substructure consists of electron-opaque lamellae, 26 A in thickness alternating with 16 A wide electron-translucent zones.