29.5 Anterior development uses localized gene regulators Antenor system Posterior system Dorsal-ventral system bioxRNA is anterior RNA is ubiquity nanosRNA is posterior ate protein (and theretore Toll )is acivated ventral Products folli de cells Spate ligand bicoid protein forms gradient is in posteror halt dorsal protein is cytoplasmic Syncytial ●●ee。●● blastoderm translater nudear do orsa on ventral sid hunchback RNA fills arterior region stripes of naps& giart RNA dpp& zen RNA are dorsal Cellulat blastoderm transcribed twist s/aj/RNA are ventral Figure 29. 17 In each axis-determining system, localized products in the egg cause other maternal RNAs or proteins to be broadly localized at syncytial blastoderm, and zygotic RNAs are transcribed in bands at cellular blastoderm 请莘大Figure 29.17 In each axis-determining system, localized products in the egg cause other maternal RNAs or proteins to be broadly localized at syncytial blastoderm, and zygotic RNAs are transcribed in bands at cellular blastoderm. 29.5 Anterior development uses localized gene regulators