{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture Notes 10-17-08 - Moleculehalflife...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Molecule half life These graphs show the rates of change in the intracellular concentrations of different  molecules when their rates of synthesis are either (A) decreased or (B) increased  suddenly by a factor of 10 Blue indicates half-lives for each molecule Red lines indicate molecules that are rapidly degraded Green lines indicate molecules that are slowly degraded Molecules that are more slowly degraded (A) are also more slowly produced (B) Proteins with key regulatory roles are often synthesized and degraded at very high rates  so that their concentration can be quickly regulated by the cell
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Most extracellular signals are hydrophilic molecules that bind cell  surface receptors Some signal molecules are hydrophobic enough or small enough to  traverse the plasma membrane and act inside the cell directly
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.
  • Fall '08
  • Goldman
  • extracellular signal molecule, small hydrophobic molecules, specific  carrier proteins, complex Relay proteins, form Bifurcation/Integration proteins, water insoluble molecules

{[ snackBarMessage ]}