mRNA is localized at antenor end 29.aNterior development uses localized gene regulators mRNA is trans lated Figure 29.5 Translation of a localized mrna generates a gradient of protein as the products Protein diffuses from site of synthesis diffuses away from the site of synthesis 消当
Figure 29.5 Translation of a localized mRNA generates a gradient of protein as the products diffuses away from the site of synthesis. 29.5 Anterior development uses localized gene regulators
29.aNterior development uses localized gene regulators Donor wild-type embryo Figure 29.6 Mutant embryos that cannot develop can be rescued by injecting cytoplasm taken from a wild-type embryo. The donor can be tested for time of appearance and Remove material from donor location of the rescuing activity the and microinject into recipient recipient can be tested for time at which it is susceptible to rescue and the effects of injecting material at Recipient different locations Mutant embryo 消当
Figure 29.6 Mutant embryos that cannot develop can be rescued by injecting cytoplasm taken from a wild-type embryo. The donor can be tested for time of appearance and location of the rescuing activity; the recipient can be tested for time at which it is susceptible to rescue and the effects of injecting material at different locations. 29.5 Anterior development uses localized gene regulators
29.5 Anterior Protein staining development uses localized gene regulators Figure 29.7 Bicoid protein forms a gradient during D melanogaster development that extends for 200 mm along the egg of 500 mm mm10020030040050 anterior postero 消当
Figure 29.7 Bicoid protein forms a gradient during D. melanogaster development that extends for ~200 mm along the egg of 500 mm. 29.5 Anterior development uses localized gene regulators
29.5 Anterior Protein staining development uses localized gene regulators Figure 29.7 Bicoid protein forms a gradient during D melanogaster development that extends for 200 mm along the egg of 500 mm mm10020030040050 anterior postero 消当
Figure 29.7 Bicoid protein forms a gradient during D. melanogaster development that extends for ~200 mm along the egg of 500 mm. 29.5 Anterior development uses localized gene regulators
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