C1QBP and neoplasm: Both cyclic TT1 and its linear lower-affinity variant, linear TT1 (“LinTT1”, sequence: AKRGARSTA), bind to p32 protein (also known as gC1qR or hyaluronic acid binding protein 1, HABP1), an intracellular protein aberrantly expressed on the surface of activated tumor cells, vascular/lymphatic endothelial cells, and macrophages/myeloid cells in hypoxic areas of the tumor [66].