Coagulation Factor III/Tissue Factor (TF), also known as Thromboplastin and CD142, is an integral membrane protein found in a variety of cell types. It functions as a protein cofactor/receptor of coagulation factor VII, which is synthesized in the liver and circulated in the plasma. Synthesized as a 295 amino acid precursor, TF consists of a signal peptide (residues 1 to 32) and the mature chain (residues 33 to 295), which includes a transmembrane region (residues 252 to 274) and a cytoplasmic tail (residues 275 to 295).