THE FINE STRUCTURE OF ANNULATE LAMELLAE

Fine Structure of Annulate Lamellae

Annulate lamellae represent a poorly understood class of cytomembranes (see references 14-18). The structural resemblance and proximity (in some cases) between the nuclear envelope and annulate lamellae have led to the concept that the annulate lamellae represent a product of the nuclear envelope although the methods propoundedly involved in the morphogenesis of annulate lamellae are indeed var...

The Fine Structure of Annulate Lamellae

Certain lamellar structures have been described from snail (Otala) and clam (Spisula) oocytes, the acinar cells of amphibian (Ambystoma) pancreas, and from rat spermatids. These structures are alike in possessing numerous rings or annuli, resembling those in the nuclear membrane. Thus the name "annulate lamellae" has been proposed for them. It is suggested that they may function in the transfer...

The Fine Structure of Annulate Lamellae* by Hewson

This paper discusses a class of lamellar structures found in the cytoplasm of several cell types. These lamellae possess a characteristic "annulate" structure resembling the nuclear membrane in the possession of numerous rings or annuli. Some, if not all, lamellae of this type are basophilic, containing a high concentration of ribose nucleic acid (9, 10). They can thus be considered as one form...

Annulate lamellae: comparison of antigenic epitopes of annulate lamellae membranes with the nuclear envelope

Annulate lamellae (AL) are a membranous structure frequently observed in differentiating gametes and tumor cells. In spite of numerous morphological studies, the function and biochemical composition of this membrane system are not well understood. In this study, we have examined the AL membrane system of vinblastine-treated mouse L cells using immunocytochemistry and Western blot analysis. Our ...

Ultrastructure of Pore Complexes of Annulate Lamellae