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Found attached to the Rough Endoplasmic Reticulum
Bound ribosomes are responsible for giving the Rough E.R. a bumpy texture, and are attached to the cytosolic side of the Rough E.R.
Bound ribosomes cannot travel around the cell like free ribosomes can
In this image, a bound ribosome can be seen. How and where it is attached to the Rough Endoplasmic Reticulum can also be seen.
Bound ribosomes produce proteins that either travel out of the cell or embed into the cellular membrane
Producing Digestive Enzymes: Ribosomes bound to the Rough E.R. produce enzymes during protein synthesis.
Once produced, these enzymes are sent outside the cell to assist in other areas of the organism, where they are used for digestion
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Polypeptide Hormones: As certain proteins are produced, they hold the function of chemical signaling. These proteins are spread throughout the cell, and outside the cell
Maintains chemical stability within cells and allows for proper secretion of material throughout cell (i.e- the pancreas with insulin)
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Membrane-Bound Proteins: Proteins produced by bound ribosomes function in the membrane.
Integral proteins, surface receptors, and cell signaling
Integral Proteins: Assist molecules in travelling through the phospholipid bilayer that could not do so on their own.
Surface Receptors: Known as transmembrane receptors, function in identifying molecules as they approach and try to enter the cell
Cell Signaling: Proteins produced by the bound ribosomes also have the function of cell signaling in the cell membrane.
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Translation: Function in translating mRNA for protein synthesis
The proteins produced here will travel outside the cell.
Proteins not used in the cell membrane are stored in vesicles