Figure 2.

Post-transcriptional regulation of Ftz during segmentation. Cartoon depicting the pattern of Ftz protein during segmentation. (A) Endogenous Ftz protein expression is limited to seven stripes. (B) Ftz protein expression is extended in hairy mutants. (C) Ftz expression in hairy mutant embryos that are also heterozygous for dgrn^DK (hairy; dgrn^DK/+) is greatly restored [17]. (D) Ftz protein expression is reduced in Dgrn-null embryos [16]. (E) Ftz protein expression is expanded in ftz^Ual embryos harboring mutations in a short “stability” motif that is required for Ftz degradation [44].