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Fibronectin, also known as fibroin, is a glycoprotein that plays a crucial role in maintaining the integrity of connective tissue and bone. It is a type of protein that is involved in regulating cell growth, development, and survival, and it can also act as an immunosuppressant. In cancer cells, fibronectin is often overexpressed or expressed at high levels due to the tumor microenvironment's destruction of normal connective tissue.
fibroin