The RMCE cassette of the TI{CRIMIC.TG4.2}CCHa2-RCR00624-TG4.2 insertion has been replaced with a TI{FFL.2} cassette that is in gene-trap (GT) orientation relative to CCHa2-R. This is expected to truncate the CCHa2-R protein and to result in the expression of a separate mCherry protein under the control of endogenous CCHa2-R regulatory sequences.