Types of Electron Carriers, Electron-Transport Complexes
Rough Endoplasmic Reticulum is divided into two sub-compartments. Rough Endoplasmic Reticulum Smooth Endoplasmic Reticulum Both types of ER comprise a system of membrane that enclose a space, or lumen, that is seperated from the surrounding cytosol. The luminal space inside the ER membranes are different from the surrounding cytosolic space. Differences Between Rough ER and Smooth ER Rough ER is defined by the presence of ribosomes bound to its cytosolic surface, where as Smooth ER lacks the ribosomes. The Rough ER is typically composed of a network of flattened sacs called cisternae (shown on figure 8.9, page 274) . The Rough Er is continuous with the outer membrane elements of the nuclear envelope, which also bears ribosomes on its cytosolic surface. Smooth ER are highly curved and tubular, forming an interconnecting system of pipelines that curve through the cytoplasm.
The Smooth ER (SER)
Functions of the Rough ER, Synthesis of Proteins on Membrane-Bound versus Free Ribosomes
Adherens Junctions and Desmosomes: Anchoring Cells to Other Cells
The Role of Cell-Adhesion Receptors in Transmembrane Signaling