The icons listed are as follows: Protein, Virion, Bacterium, Fungus, Helminth/Parasite, antigenic peptide, T cell receptor, C D 4, M H C Class 1, C D 28, Cytokine, Complement receptor, antibody, C D 3, C D 8, M H C Class 2, C D 80/86, Cytokine receptor, T L R, F C receptor, Hematopoietic stem cell, Immature thymocyte, T H cell, T C cell (naive), Cytotoxic T Cell (effector), B Cell, Plasma cell, Innate lymphoid cell, Natural killer cell, erythrocyte, platelets, neutrophil, basophil, eosinophil, mast cell, dendritic cell, monocyte, and macrophage.