Septins assemble into nonpolar filaments that form rings and cagelike structures, or recruit and organize the actin and microtubule cytoskeletons.

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#Id: 7260

#Unit 6. System Physiology – Plant

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#Id: 2273

#Unit 3. Fundamental Processes

The lac promoter along with the bulk of other E. coli promoters, is recognized by RNA polymerase bearing the σ70 subunit.

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#Id: 1330

#Unit 4. Cell Communication and Cell Signaling

Phospholipase C cleaves PI(4,5)P2, generating two second messengers:  IP3 and DAG

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#Id: 7409

#Unit 5. Developmental Biology

The wingless (wg) gene is activated in those bands of cells that receive little or no Even-skipped or Fushi tarazu protein, but which do contain Sloppy-paired

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#Id: 3809

#Unit 5. Developmental Biology

Once all proteins are functioning, a few starving cells start to emit cAMP pulses.