Suppressor and growth soluble factor were well known as regulator in immuno response.
Growth soluble factor was named Interleukin 1 (M. W 12, 000-18, 000) and Interleukin 2 (M. W 30, 000-35, 000) at the 2nd International lymphokine workshop in 1979.
Amberlite XAD-2 has strong capacity of adsorption to growth soluble factor but not has adsorbability to serum proteins.
