Archaea membrane lipids are isoprene-based lipids.

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#Unit 13. Methods in Biology

Notice that S1 mapping and primer extension are well suited to mapping transcripts made in vivo; by contrast, run-off transcription relies on transcription in vitro.

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#Id: 6106

#Unit 3. Fundamental Processes

Thymine dimers cause mutations in two ways. (1) Dimers perturb the structure of DNA double helices and interfere with accurate DNA replication. (2) Errors occur during the cellular processes that repair defects in DNA, such as UV-induced thymine dimers To identify chemicals that are converted into mutagens in the liver, the Ames test treats potential indirect mutagens with a mixture of liver extract

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#Unit 4. Cell Communication and Cell Signaling

Gαt contains an intrinsic GTPase activity by GAP complex, RGS9-Gβ5 triggers the rapid inactivation of the PDE

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#Id: 8376

#Unit 2. Cellular Organization

Myosin 

Actin-based motors powered by ATP hydrolysis.

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#Id: 5933

#Unit 10. Ecological Principles

Energy web emphasizing the links that process the most energy.  Line thickness indicates the relative amount of energy flowing along a particular link.