Mapping data for RpS26attP-KO, where we deleted RpS26 exon 2 is indicated below. After the sequence GAAATTGATAAATAAGGTAATTATG which covers part of the first exon and the beginning of the second intron, there is are attP and loxP sites followed by GTGCTTCATTGGGAAACAGCTACTACCTACA from the RpS26 endogenous 3’UTR. The coding sequence of RpS26 exon 2 is deleted.