Fig. 6. Uab^HH1 homozygous embryo at stage 14 (11 hours) stained with antibody to ABD-A protein. The arrow marks a cell in the ventral nerve chord in PS6 which is expressing ABD-A. At most only a few cells in PS6 show ABD-A misexpression by late embryogenesis. ABD-A is reduced in the epidermis of PS7 (flanked by brackets), along the border between the first and second abdominal segments.