. "Revisit this term after coordinating with SO/SOM. The domain of this relation should be a sequence, as an instance of a DNA molecule is only expressed in the cell of which it is a part." . . "ubiquitously expressed in"@en . "Chris Mungall" . . "x is ubiquitously expressed in y if and only if x is expressed in y, and the majority of cells in y express x" . .