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Home Q & A Board Science-Related Homework Help Psychology Neuroscience and Mental Health
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retard23 retard23
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6 years ago
Receptor tyrosine kinases:
 
  A. Act through second messenger systems.
   B. Are usually activated by neuropeptides or hormones.
   C. Function through phosphorylation of tyrosine.
   D. Both A and C
   E. All of the above
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#1
6 years ago
ANS: E
Rationale: Tyrosine kinsase receptors act through second messenger systems and are typically activated by neuropeptides or hormones. These receptors are named for an intracellular site that alters its properties by adding phosphate groups to tyrosine when extracellular ligand binding occurs. This phosphorylation activates downstream molecules, initiating a signalling cascade.
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