logging in or signing up CELL JUNCTIONS gutta_honey Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 897 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: March 09, 2012 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript CELL JUNCTIONS : CELL JUNCTIONSCell junctions are provided by cell adhesion molecules: Cell junctions are provided by cell adhesion molecules Cell Adhesion Molecules (CAMs) are proteins located on the cell surface involved with the binding with other cells or with the extracellular matrix (ECM) in the process called “cell adhesion”. Essentially, cell adhesion molecules help cells stick to each other and to their surroundings.These proteins are typically transmembrane receptors and are composed of three domains: : These proteins are typically transmembrane receptors and are composed of three domains: an intracellular domain that interacts with the cytoskeleton, a transmembrane domain an extracellular domain that interacts either with other CAMs of the same kind ( homophilic binding) or with other CAMs or the extracellular matrix ( heterophilic binding). ADHESIVE JUNCTION “buttons or zipper” between 2 cells Consist of dense glycoprotein bodies inside cells (plaques): ADHESIVE JUNCTION “ buttons or zipper” between 2 cells Consist of dense glycoprotein bodies inside cells (plaques ) DESMOSOME – between 2 cells. Proteins called cadherins between 2 plaques - spot-desmosomes Band-desmosomes Can be “ adherens junction” actine + cadherine . Less strong than desmosome HEMIDESMOSOMES – between cell and basal membrane. Proteins called Integrines of cell anchored to the matrix.TIGHT JUNCTION : TIGHT JUNCTION - 2 cells fuse together by occludins - Create impermeable barrier in kidneys, brain, intestines JUNCTION COMPLEX: JUNCTION COMPLEX Tight junction + adhesive junction GAP JUNCTION: GAP JUNCTION - Cytoplasmic bridge between cells for passing chemical and electrical signals Connexines – cylindrical proteins - Mostly in heart and nerves, but can be found in liver, pancreas, ovary, thyroid glands ZONULA OCCLUDENS : ZONULA OCCLUDENS Zone where row of occludines create barrier ZONULA ADHERENS : ZONULA ADHERENS Zone of belt-desmosome or Adherens junctionPowerPoint Presentation: MACULA ADHERENS -DESMOSOME You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.