87,314bp genomic fragment (clone 22M14 from the CH321 BAC library) which contains Dscam.
Dscam1+tCH321-22M14 rescues Dscam120
Dscam1+tCH321-22M14 rescues Dscam120/Dscam121
Dscam1+tCH321-22M14 rescues Dscam120/Dscam123