The fly stock referred to as the 'CecSK6 deletion' in FBrf0241672 has subsequently been found to carry an extra copy of the wild-type Cecropin locus distal to the deletion, possibly due to a complex recombination event. References to the CecSK6 mutation as a Cecropin mutant have been removed from the FBrf0241672 manuscript at the publishers site. The corresponding FlyBase entry for the 'CecSK6' aberration chromosome (Df(3R)Cec-SK6, FBab0049047) has been deleted.