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April 29, 2013?. Convergent extension Triploblastic.

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Presentasjon om: "April 29, 2013?. Convergent extension Triploblastic."— Utskrift av presentasjonen:

1 April 29, 2013?

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5 Convergent extension

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7 Triploblastic

8 ~1000 cells Sea Urchin

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10 Vade mecum …Movies Sea Urchin

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12 Primary mesenchyme is also called skeletogenic mesenchyme

13 Sea Urchin Receptors?

14 Vade mecum …Movies Sea Urchin

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16 Sea Urchin – first stage of archenteron formation

17 ~1000 cells Sea Urchin

18 Convergent extension Sea Urchin – second stage of archenteron formation

19 Sea Urchin – third stage of archenteron formation

20 Sea Urchin Nodal BMP-2/ BMP-4

21 ~1000 cells Sea Urchin

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25 Skeletogenic micromeres: Beta Catenin (only autonomous cells) Sea Urchin

26 Figure 8.12(1) The Role of  -catenin in Specifying the Vegetal Cells of the Sea Urchin Embryo

27 Disheveled expression in early Sea Urchin Embryos Disheveled (maternal, autonomous)

28 Figure 8.12(2) The Role of  -catenin in Specifying the Vegetal Cells of the Sea Urchin Embryo LiCl treatment (probably block of GSK-3 activ.)

29 Figure 8.12(3) The Role of  -catenin in Specifying the Vegetal Cells of the Sea Urchin Embryo

30 Figure 8.13 The Micromere Regulatory Network Proposed by Davidson and Colleagues (2002)

31 Figure 8.14(1) A Model of Endoderm Specification

32 ~1000 cells Sea Urchin Archenteron Blastocoel

33 Amphibian

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36 earlyZfish| zfish: frog: Frog gastrul/neurul: Frog Inner Gast: urchin longer:

37 Amphibian

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41 Vade Mecum Amphibian

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48 Figure 12.8(1) Movements of Cells During Secondary Neurulation in Xenopus

49 Figure 12.8(2) Movements of Cells During Secondary Neurulation in Xenopus

50 Amphibian

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