During early cleavage, each asymmetrical division produces:

• One founder cell (denoted AB, E, MS, C, and D) that produces differentiated descendants
• One stem cell (the P1–P4 lineage) 

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#Id: 9323

#Unit 4. Cell Communication and Cell Signaling

Terminate the visual response involves phosphorylation of activated (R*) rhodopsin, but not its dark (R) form

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#Id: 10228

#Unit 6. System Physiology – Plant

brassinolide binds to brassinosteroid receptor kinase BRASSINOSTEROID-INSENSITIVE1 (BRI1) on the plasma membrane triggers a phosphorylation cascade that causes a repressor protein, BRASSINOSTEROID-INSENSITIVE2 (BIN2), to become inactivated.

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#Id: 8082

#Unit 1. Molecules and their Interaction Relevant to Biology

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#Id: 2606

#Unit 13. Methods in Biology

SSRs are highly polymorphic.

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#Id: 774

#Unit 3. Fundamental Processes

RNA polymerase starts most transcripts with an A (75%) or G