High resolution image of a myoneme of Opercularia coarctata. Such fibrous bundles are known to be composed of centrin, a filament that contracts when exposed to calcium. The ER is closely associated w...

High magnification view of rough endoplasmic reticulum (RER) from rat pancreas showing RER and ribosomes, both bound (RiB) and free (RiF). Ribosomes were originally called Palade particles, as Palade ...

Morphology of the endoplasmic reticulum during a period of rapid cell differentiation. This micrograph shows two typical patterns of rough endoplasmic reticulum (RER) in developing liver from a one da...

A myoneme of Opercularia coarctata. Such fibrous bundles are known to be composed of centrin, a filament that contracts when exposed to calcium. The ER is closely associated with the myonemes and send...

Vorticella convallaria fixed for EM and buffered in cacodylate. The rough ER is not vesiculated as it is in collidine buffered fixatives but appears as sheets from which Golgi dictyosomes arise. A foo...

Morphology of the endoplasmic reticulum during a period of rapid cell differentiation. This micrograph shows two typical patterns of rough endoplasmic reticulum (RER) in developing liver from a one da...

Micrograph illustrating the general preservation of the cytoplasm in a Micrasterias cell stabilized by ultrarapid freezing. P-face of RER membranes depicting several spiral imprints of polysomes. The...

Micrograph illustrating the Golgi apparatus and rough endoplasmic reticulum (RER) cell stabilized by ultrarapid freezing. Note the relationship of the RER membrane to the Golgi complex. Technical d...

Low-power micrograph illustrating the general preservation of the cytoplasm in a Micrasterias cell stabilized by ultrarapid freezing. The large, sheetlike membranes of the rough endoplasmic reticulum...

Micrograph illustrating the general preservation of the cytoplasm in a Micrasterias cell stabilized by ultrarapid freezing. E-face of RER membranes depicting several spiral imprints of polysomes. Th...