cell expresses x 'cell expresses' y iff: cell(x) AND gene(y) AND exists some 'transcription, DNA templated (GO_0006351)'(t) AND t occurs_in x AND t has_input y A relation that applies between a cell(c) and a gene(g) , where the process of 'transcription, DNA templated (GO_0006351)' is occuring in in cell c and that process has input gene g. expresses cell David Osumi-Sutherland