CELL TO CELL JUNCTIONS BY: ASHLEY COHN

SURFACE MARKERS STRUCTURE VARIABLE, INTEGRAL OR GLYCOLIPIDS IN PLASMA MEMBRANE. FUNCTION IDENTIFY THE CELL EXAMPLE MHC COMPLEXES, BLOOD GROUPS, ANTIBODIES

SEPTATE JUNCTIONS/ TIGHT JUNCTIONS STRUCTURE TIGHTLY BONDED, LEAK PROOF, FIBROUS CLAUDIN PROTEIN THAT SEALS THE CELL FUNCTION HOLDS CELL TOGETHER SO THAT MATERIALS PASS THROUGH BUT NOT BETWEEN THE CELLS EXAMPLE JUNCTIONS BETWEEN EPITHELIAL CELLS IN THE GUT

ADHESIVE JUNCTION(DESMOSOME) STRUCTURE VARIENT CADHERINS, DESMOCOLLINS, BIND TO INTERMEDIATE FILAMENTS OF CYTOSKELETON FUNCTION CREATES STRONG FLEXIBLE CONNECTIONS BETWEEN CELLS, FOUND IN VERTEBRATES EXAMPLE EPITHELIUM

CADHERIN IS A PROTEIN WHICH IS A CA 2+ DEPENDENT ADHESION MOLECULE WITH VERY WIDE POLYGENETIC DISTRIBUTION. DESMOSOMES ARE A CADHERIN BASED JUNCTION UNIQUE TO VERTEBRATES. THEY CONTAIN THE CADHERIN'S DESMOCOLLIN.

ADHESIVE JUNCTION ( ADHERENS JUNCTION) STRUCTURE CLASSIC ADHERINS BIND TO MICROFILAMENTS OF CYTOSKELETONS FUNCTION CONNECTS CELLS TOGETHER, OLDEST FORM OF JUNCTION, FOUND IN ALL MULTICELLULAR ORGANISMS EXAMPLE TISSUE WITH HIGH MECHANICAL STRESS SUCH AS THE SKIN

ADHESIVE JUNCTION (HEMIDESMOSOMES, FOCAL ADHESION) STRUCTURE INTEGRIN PROTEINS BINDS CELL TO EXTRACELLULAR MATRIX FUNCTION PROVIDE ATTACHMENT TO A SUBSTRATE EXAMPLE INVOLVED IN CELL MOVEMENT AND IMPORTANT DURING DEVELOPMENT

COMMUNICATING JUNCTION (GAP JUNCTION ) STRUCTURE SIX TRANSMEMBRANE CONNEXON /PANNEXIN PROTEINS CREATING A PORE THAT CONNECTS CELLS FUNCTION ALLOWS FOR PASSAGE OF SMALL MOLECULES FROM CELLS TO CELL IN A TISSUE EXAMPLE EXCITABLE TISSUE SUCH AS HEART MUSCLE

PANNEXINS ARE PROTEIN FOUND IN INVERTEBRATES CONNEXONS ARE A PROTEIN IN VERTEBRATES

COMMUNICATING JUNCTION ( PLASMODESMATA) STRUCTURE CYTOPLASMIC CONNECTIONS BETWEEN GAPS IN CONJOINING PLANTS CELL WALLS FUNCTION COMMUNICATING JUNCTIONS BETWEEN PLANT CELLS EXAMPLE PLANT TISSUE

PLASMODESMATA IS CYTOPLASMIC CONNECTIONS THAT FORM ACROSS THE TOUCHING PLASMA MEMBRANES

ALL INFORMATION IN THIS POWER POINT CAN BE FOUND IN MGRAW HILL BIOLOGY 10 TH EDITION ON PAGES 83-85