The RMCE cassette of the TI{CRIMIC.TG4.0}MED19CR60199-TG4.0 insertion has been replaced with a TI{FFL.0} cassette that is in gene-trap (GT) orientation relative to MED19. This is expected to truncate the MED19 protein and to result in the expression of a separate mCherry protein under the control of endogenous MED19 regulatory sequences.