Arg to His substitution at amino acid 310, within the amino terminal half.
G17441860A
R310H | dl-PA; R310H | dl-PB; R310H | dl-PC; R310H | dl-PD; R310H | dl-PE; R310H | dl-PF
R310H
Site of nucleotide substitution in mutant inferred by FlyBase based on reported amino acid change.
When in trans with Df(2L)TW119 the transgene P{Dipt2.2-lacZ} is not induced.
Weak dorsalization at 18oC: deletion of mesoderm but some ventral and lateral epidermis forms. Strong dorsalization at 22oC: loss of ventral epidermis.
Embryos derived from homozygous females are incompletely dorsalised at 29oC; a tube of dorsal cuticle is formed. These embryos usually form some Filzkorper material and a small piece of head skeleton. At 18oC, the embryos are much less dorsalised and form ventral setae.