gbb cis-regulatory sequences drive expression of Hsap\BMP7 containing a mutation (amino acid replacement R292G) in the "Main" predicted furin cleavage site.
Hsap\BMP7R292G.gbb is a non-suppressor of lethal phenotype of gbbD20/Df(2R)bw-S46
The loss of posterior crossvein seen in gbb4/Dp(2;2)DTD48 gbb4 flies is not rescued by expression of Hsap\BMP7R292G.gbb.