Deletion of at least 1.7kb from the central part of CTCF (the exact breakpoints are not known).
CTCFP35.2/CTCF9 have pharate adult lethality, with rare escapers that eclose but die within 24-48hr, and show homeotic transformations of abdominal segments (A6-8): in males genitalia is rotated by approximately 20-180[o] (90%), s6 (sternite of the sixth segment) has 4-8 (average 6) bristles; in females s7 has 12-16 (average 14) bristles, shape of s7 transformed toward s6 and bristles lose orientation, and t8 has rows of large bristles.
CTCF9/CTCFy+1 is rescued by CTCFUbi-p63E.Tag:StrepII
CTCF9 is rescued by CTCFUbi-p63E.Tag:StrepII
CTCFUbi-p63E.T:Zzzz\StrepII rescues viability of CTCFy+1/CTCF9 or CTCF9/CTCF9 flies.