NEGATIVE STAINING AND ADENOSINE TRIPHOSPHATASE ACTIVITY OF ANNULATE LAMELLAE OF NEWT OOCYTES
نویسندگان
چکیده
منابع مشابه
Negative Staining and Adenosine Triphosphatase Activity of Annulate Lamellae of Newt Oocytes
Semi-isolated annulate lamellae were prepared from single newt oocytes (Triturus alpestris) by a modified Callan-Tomlin technique. Such preparations were examined with the electron microscope, and the negative staining appearance of the annulate lamellae is described. The annulate lamellae can be detected either adhering to the nuclear envelope or being detached from it. Sometimes they are obse...
متن کاملBehaviour of annulate lamellae during the maturation of oocytes in the newt, Cynops pyrrhogaster.
The distribution of annulate lamellae, electron-dense masses, rough endoplasmic reticulum, and Golgi complexes in longitudinal sections of newt oocytes at several stages of progesterone-induced maturation was recorded with an electron microscope equipped with a drawing device. Annulate lamellae in full-grown oocytes occur in close contact with electron-dense masses and the nuclear envelope and ...
متن کاملObservations on the Annulate Lamellae of Immature Amphibian Oocytes
Electron microscopy has established the existence of a complex membranous-bound system of cavities, the endoplasmic reticulum, in the cytoplasm of numerous cells (1). By means of the same technique, what may be parts of another cytoplasmic organelle, the annulate lamellae (2), has also been discovered. These usually consist of a number of parallel, double-membraned sheets, each of which structu...
متن کاملIntranuclear and Cytoplasmic Annulate Lamellae in Tunicate Oocytes
Electron microscope studies were made on various tunicate oocytes at different stages of growth and development. Both the inner and outer lamellae of the perforated nuclear envelope demonstrate considerable blebbing activity. The blebs of the inner lamella detach into the nucleoplasm where they undergo a special type of fusion process resulting in the formation of numerous, usually single, diff...
متن کاملFine 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...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 1969
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb.42.2.519