Question

The name given to the integral proteins of the sr is and these proteins seem to function as

Answer 1

The integral proteins of the sarcoplasmic reticulum function as transport proteins, such as channels or aquaporins, and as cell recognition proteins, including receptors that bind to ligands like dopamine in nerve cells.

Step-by-step explanation:

The integral proteins of the sarcoplasmic reticulum (SR) function as transport proteins or channels. These proteins span the membrane and are involved in the movement of substances into and out of cells. For example, channel proteins have a hydrophilic domain exposed to intracellular and extracellular fluids and have a hydrophilic channel that allows polar compounds to pass through the membrane layers. One such integral protein is aquaporin, which facilitates the passage of water through the membrane at a high rate.

Integral proteins may also serve as cell recognition proteins, marking a cell's identity so that it can be recognized by other cells. A receptor is a type of recognition protein which binds to a specific molecule outside the cell, called a ligand, and induces a chemical reaction within the cell. An example of this is the dopamine receptors on nerve cells, which, when binding with dopamine, open an ion channel within the transmembrane protein.

Answer 2

They are referred to as Junctional Foot Proteins. They are found in the intermembrane space between T-tubules of muscle fibers and the cisternae membrane of the endoplasmic reticulum. The proteins have been observed to function as a Ca+ ion channel.