Not to be confused with Retinal. Retinol, also known as Vitamin A1, is a vitamin found in food and used as a dietary supplement. As a supplement it is used to treat and prevent vitamin A deficiency, especially that which is resulting in xerophthalmia.
Desmosomes are anchoring junctions â mechanical couplings scattered like rivets along the sides of adjacent cells to prevent their separation. On the cytoplasmic face of each plasma membrane is a thickening called a plaque.
Cell Junctions. There are three major types of cell junctions: anchoring junctions, tight junctions, and gap junctions. They consist of protein complexes and are found in various tissues of vertebrates, especially muscles and epithelial tissues. Cell junctions are made from proteins called cell adhesion molecules, which are signal receptors in the cell membrane.