The transcribed sequences, BsaBI site in exon 1 through to the BglI site in exon 3, are replaced by an equivalent sequence from su(wa) cDNA and BglI site in exon 3 is replaced by the SstI site in the last exon from the su(wa) cDNA.
The presence of su(wa)cDNA3.5 in wa/su(wa)g165 or wa/su(wa)8 individuals causes a yellow eye colour phenotype.