what are actin filaments edit actin filaments f actin are linear polymers of globular actin g actin subunits and occur as microfilaments in the cytoskeleton and as thin filaments which are part of the contractile apparatus in muscle and nonmuscle cells see contractile bundles
CELLULAR ADHESION MOLECULES 91 Thus, modulation of syndecan expression may be required for the maintenance of some tumors.67 In humans, Ridley et al68 have examined syndecan expression, structure, and function on myeloma cells.
Cell surface receptors are receptors that are embedded in the membranes of cells. They act in cell signaling by receiving extracellular molecules. They are specialized integral membrane proteins that allow communication between the cell and the extracellular space. The extracellular molecules may be hormones, neurotransmitters, cytokines, growth factors, cell adhesion molecules, or nutrients; they react with the receptor to induce changes in the metabolism and activity of a cell. In the process