TGFBIp dimerization in solution is concentration dependent.A, wildtype, B, R124H, C, R555W, and D, A546T TGFBIp at concentrations of 1, 3, or 7 μM were subjected to calibrated SEC. Size markers for calibration are indicated: 158 kDa (aldolase), 75 kDa (conalbumin), 44 kDa (ovalbumin), and 29 kDa (carbonic anhydrase). A concentration-dependent dimerization of TGFBIp is observed for both wildtype and mutants.