Some elements exist naturally as molecules. For example, hydrogen and oxygen exist as two-atom molecules.

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#Id: 6916

#Unit 8. Inheritance Biology

Segmental duplications have played an important role in the evolution of human chromosomes; about 4% of the human genome consists of segmental duplications. 

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#Id: 8996

#Unit 6. System Physiology – Plant

Regeneration of the CO2 acceptor ribulose 1,5-bisphosphate. 

The cycle is completed by regeneration of ribulose 1,5-bisphosphate through a series of ten enzyme-catalyzed reactions, one requiring ATP.

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#Id: 2767

#Unit 13. Methods in Biology

We perform DNase footprinting by binding the protein to its DNA target, then digesting the DNA–protein complex with DNase. 

When we electrophorese the resulting DNA fragments, the protein binding site shows up as a gap, or “footprint,” in the pattern where the protein protected the 

DNA from degradation.

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#Id: 1884

#Unit 4. Cell Communication and Cell Signaling

T cells initiate the adaptive immune response by interacting MHC on antigen-presenting cells that have been exposed to pathogens.

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#Id: 9608

#Unit 4. Cell Communication and Cell Signaling

For most, but not all, RTKs, the weakly active kinase in each subunit is phosphorylate a key tyrosine in the activation loop of the other subunit (trans-phosphorylation)