Figure 4.

Interaction between CD⁴⁺CD²⁵⁺PGRPs⁺S100A4⁺ lymphocytes and target cells in the presence and absence of S100A4 on their surface. А. S100A4 and PGRPs on the lymphocyte's surface form a complex with Hsp70 on the surface of target cell that do not express S100A4 during a lymphocyte-cell contact. B. S100A4 and PGRPs on the lymphocyte's surface do not form complex with Hsp70 on the surface of target cell that express S100A4 during a lymphocyte-cell contact. C. PGRPs on the lymphocyte's surface do not form complex with Hsp70 on the surface of target cell that do not express S100A4 during a lymphocyte-cell contact.