Each eukaryotic chromosome contains a large number of replicons spaced unevenly throughout the chromosomes.

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#Id: 7464

#Unit 5. Developmental Biology

In prespore cells, PKA activation occurs by signalling cascade that is activated by SDF-3, which triggers the synthesis of GABA

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#Unit 5. Developmental Biology

Secreted GABA then acts on prestalk cells to induce the cell-surface exposure of the serine protease domain of the ABC transporter TagC.

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#Id: 7466

#Unit 5. Developmental Biology

GABA acts on prespore cells to induce secretion of AcbA.

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#Unit 5. Developmental Biology

AcbA is cleaved by the TagC protease to produce the peptide SDF-2.

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#Unit 5. Developmental Biology

SDF-2 activates the histidine phosphatase activity of DhkA, which induces spore encapsulation.

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#Unit 5. Developmental Biology

Prestalk cells act as altruists which die for dispersion of kin cells.