1110bp deletion, from nucleotide position 379-1488 (coordinates from FBrf0058525), starts from exon 1 and extends to the 5' half of exon 4.
1110 base deletion beginning upstream of the su(f) initiator Met and extending into exon 4.
Lethality occurs during larval or pupal stages. Homozygous germline clones display cell lethality. Embryos derived from heterozygous mothers exhibit neither CNS or PNS defects.
su(f)4/su(f)6 females are fully viable and normal at 17-18oC. At 24-25oC, they vary in viability, show a broad streak of dark pigment on the thorax which is sometimes concentrated at the dorsal anterior region and have wings which sometimes stick up and out. At 29-30oC, they die just prior to puparium formation. su(f)6/su(f)1 shows a Minute-like phenotype at 24-25oC and results in lethality at 29-30oC.
Lifschytz.
su(f)6 complements su(f)4 only at 25oC. The allelic state of z has no effect on complementation behaviour.