has characterizing marker set has marker gene combination This relation is not meant for cases where set of genes/proteins are only useful as markers in some specific context - e.g. in some specific location. In these cases it is recommended to make a more specific cell class restricted to the relevant context. 'Lamp5-like Egln3_1 primary motor cortex GABAergic interneuron (Mus musculus)' subClass_of: has_characterizing_marker_set some 'NS forest marker set of Lamp5-like Egln3_1 MOp (Mouse).'; NS forest marker set of Lamp5-like Egln3_1 SubClass_of: ('has part' some 'Mouse Fbn2') and ('has part' some 'Mouse Chrna7') and ('has part' some 'Mouse Fam19a1'). transcriptomically defined cell type X subClass_of: (has_characterizing_marker_set some S1); S1 has_part some gene 1, S1 has_part some gene 2, S1 has_part some gene 3. C has_characterizing_marker_set y iff: C is a cell type and y is a collection of genes or proteins whose expression is sufficient to distinguish cell type C from most or all other cell types. A relation that applies between a cell type and a set of markers that can be used to uniquely identify that cell type. has marker signature set cell Shawn Zheng Kai Tan