Complexity of cell interactions: analysis using antigens under Ir gene control.
Baltz M., Erb P., Feldmann M., Howie S., Kontiainen S., Torano A.
The properties of three I region associated immunoregulatory factors involved in cell interactions are described. These are antigen specific T helper factor, suppressor factor produced by metabolically active T cells and genetically restricted factor, which is produced by macrophages and is involved in T helper cell induction. The use of these factors to analyse cell interactions is discussed.