Exons are usually short, typically encoding fewer than 100 amino acids

Exon sequences are conserved by the negative selection of individuals in which the sequences have changed.

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#Id: 5749

#Unit 10. Ecological Principles

Controlling effect of species 

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#Id: 9671

#Unit 4. Cell Communication and Cell Signaling

PH domain of PKB binds with high affinity to the 

3-phosphates in both PI(3,4)P2 and PI(3,4,5)P3

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#Id: 1215

#Unit 7. System Physiology – Animal

The role of parathyroid hormone is to regulate the concentration of Ca2+ in ECF.

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#Id: 7408

#Unit 5. Developmental Biology

The engrailed gene is activated in cells that have high levels of the Even-skipped, Fushi tarazu, or Paired & repressed in cells that have high levels of Odd-skipped, Runt, or Sloppy-paired

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#Id: 1471

#Unit 4. Cell Communication and Cell Signaling

The extracellular matrix is a dynamic, complex meshwork of proteins and polysaccharides that contributes to the structure and function of a tissue.