Fig. 5. Expression of Abd-B protein in iab-8,9 mutations. Numbers refer to parasegments. (A) Wild-type Abd-B protein expression (dorsal view of a stage 12 embryo). (B) The same stage and view in an iab-8,9 homozygous embryo. The expression in PS14 and PS13 is clearly reduced but expression in PS12 does not change (slightly out of focus in A). (C) Abd-B expression in the posterior region of a stage 14 wild-type embryo. (D) Similar region of an iab-8,9 homozygous embryo. Note that Abd-B expression is reduced in PS13 (A8) and slightly increased in PS12 (A7) when compared with that of a wild-type embryo (C).