Lec41 c-elegans figure

Lec41 c-elegans figure - " ' Posterior Signal Receptor...

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Unformatted text preview: " ' Posterior Signal Receptor protein Anterior " Posterior daughter g Q "3' daughter cellof3 .-’ " cellof3 Will go on to Will go on to form adult intestine form muscle and gonads (a) Induction of the inteStinal precursor cell at the four-cell stage. A signal protein. on the surf-ace of cell 4 induces events . in_'ce|| 3 that determine the fate of the posterior daughter cell of- cell 3. The fates of the cells arising from the anterior ' daUghter-cell are determined by later events. Epidermis\ LARVA Signal Gonad Anchor cell protein Vulval precursorcells ADULT "1' inner vulva Outer-vulva Epidermis (b) Induction of vulvai cell types during larval development. The vulva arises from six-precursor cells on the embryos ventral surface. The anchor cell in the gonad secretes many copies of a particular signal protein, providing a strong inductive signal to the closest precursor cell (dark blue), causing it to form the inner part of the vulva. The two adjacent cells (medium blue) receive a weaker signal and are induced to form the outer vulva. The three remaining precursor cells.(light blue) are too far away to receive the signal; they give rise to epidermal cells. Additional signaling among the precursor cells, not depicted in this figure, also plays a role in vulvai development, ...
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This note was uploaded on 09/23/2010 for the course BIO 202 taught by Professor Dean during the Fall '08 term at SUNY Stony Brook.

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Lec41 c-elegans figure - " ' Posterior Signal Receptor...

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