Table 3. GtoImmuPdb cell type top-level categories, with associated Cell Ontology terms and count of distinct targets annotated to each category.

Cell type category	Cell Ontology terms	Targets annotated
B cells	CL:0000945 lymphocyte of B lineage	32
T cells	CL:0000789 alpha-beta T cell	39
	CL:0000815 regulatory T cell
	CL:0000911 effector T cell
Dendritic cells	CL:0000451 dendritic cell	29
Other T cells	CL:0000798 gamma-delta T cell	1
	CL:0000814 mature NK T cell
	CL:0000898 naive T cell
	CL:0000940 mucosal invariant T cell
Macrophages and monocytes	CL:0000235 macrophage	37
	CL:0000576 monocyte	37
Granulocytes	CL:0000094 granulocyte	34
Natural killer cells	CL:0000623 natural killer cell	21
Mast cells	CL:0000097 mast cell	26
Innate lymphoid cells	CL:0001065 innate lymphoid cell	0
Stromal cells	CL:0000499 stromal cell	0

T cells are split into two categories, ‘T cells’ and ‘other T cells’, which was to keep the regulatory T cells together and distinct from other T cell types.