endoplasmic reticulum

image gjh.md

1. smooth endoplasmic reticulum (smooth ER)
2. cisternal space -- lumen -- of rough endoplasmic reticulum (rough ER) with proteins produced on exterior
3. cisternae of rough ER
4. chains of ribosomes along mRNA on membrane of rough ER, the proteins move into the lumen of the cisterna following assembly
5. rosette-shaped nuclear pore (size exaggerated)

6. nuclear membrane continuous with membrane of ER

7. strands of heterochromatin adherent to nucleolus

8. nucleolus, site of production of ribosome components

9. nuclear material in nucleus (cut-away)

animation - smooth endoplasmic reticulum : tour smooth ER :
animation - rough ER with ribosomes : tour rough ER :
zoom in on rough ER : animation - ribosomes : ribosome close-up and rough ER : Virtual Cell Textbook - Cell Biology : Back to Main page of Cell : cytoplasm : exosomes : nuclear pores : ribosomes : Main page of Cell to Cell : Main page of BioChemistry : peptides : proteins : translation : Main page of Molecule : Main page of Pathways: Main page of Genes : Main page of Neuron: synapse :