Endoplasmic reticulum
From CreationWiki, the encyclopedia of creation science
(1) Nucleus. (2) Nuclear pore. (3) Rough endoplasmic reticulum (RER). (4) Smooth endoplasmic reticulum (SER). (5) Ribosome on the rough ER. (6) Proteins that are transported. (7) Transport vesicle. (8) Golgi apparatus. (9) Cis face of the Golgi apparatus. (10) Trans face of the Golgi apparatus. (11) Cisternae of the Golgi apparatus. (12) Secretory vesicle. (13) Cell membrane. (14) Secretion of proteins. (15) Cytoplasm. (16) Extracellular space.
The Endoplasmic reticulum is a transport network for molecules targeted for certain modifications and specific destinations, as compared to molecules that will float freely in the cytoplasm.
The ER has two forms: the rough ER and the smooth ER. The rough ER is labeled as such because it has ribosomes adhering to its outer surface, whereas the smooth ER does not. Translation of the mRNA for those proteins that will either stay in the ER or be exported (moved out of the cell) occurs at the ribosomes attached to the rough ER. The smooth ER serves as the recipient for those proteins synthesized in the rough ER. Proteins to be exported are passed to the Golgi apparatus, sometimes called a Golgi body or Golgi complex, for further processing, packaging, and transport to a variety of other cellular locations.[1]
References
- ↑ What is a Cell? by the National Center for Biotechnology Information
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