Wnt signaling cascade is to downregulate the expression of the pop-1 gene in the EMS daughter destined to become the E cell.

TLS Online TPP Program

#Id: 3851

#Unit 5. Developmental Biology

ACG act as an osmosensor, so spores formed from the acg- cells will germinate irrespective of the osmotic conditions.

TLS Online TPP Program

#Id: 3852

#Unit 5. Developmental Biology

Adenylate cyclase B (ACB) is normally expressed in prestalk cells, but is upregulated in the prespore region of acg null structures.

TLS Online TPP Program

#Id: 3853

#Unit 5. Developmental Biology

In D. discoideum cAMP phosphodiesterase RegA plays a crucial role in regulating intracellular cAMP levels cells & level of PKA activity.

TLS Online TPP Program

#Id: 3854

#Unit 5. Developmental Biology

RegA is activated by phosphorylation of an aspartate in its response regulator domain.

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#Id: 3855

#Unit 5. Developmental Biology

Dictyostelia (social amoebas)

solitary haploid amoebae live on decaying logs, eating bacteria and reproducing by binary fission.

TLS Online TPP Program

#Id: 3856

#Unit 5. Developmental Biology

Dictyostelium can utilize one of three survival strategies when food starvation-

(1) Microcyst formation, favoured in dark & wet conditions, or ammonia levels are high.
(2) Zygote formation, favoured in dark & wet conditions, & triggered by ethylene produced by the cells.
(3) Cell aggregation & differentiation