Fibronectin Binds to Integrin,an Integral Plasma Membrane Protein

Fibronectin binds to integrin,an integral plasma membrane protein.Binding of fibronectin to the extracellular domain of integrin changes integrin's conformation.The change in protein conformation is transmitted to the cytoplasm resulting in a cascade of reactions.What does this description describe?

A) transport
B) enzymatic activity
C) intracellular joining
D) cell-cell recognition
E) signal transduction

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