Complex sentence: In normal tissue, basic fibroblast growth factor (also known as bFGF or FGF2) is present in basement membranes and in the subendothelial extracellular matrix of blood vessels, and stays membrane-bound as long as there is no signal peptide.
Split into simpler sentences: In normal tissue, basic fibroblast growth factor is present in basement membranes and in the subendothelial extracellular matrix of blood vessels. It stays membrane-bound as long as there is no signal peptide.