The auxin receptor is composed of two proteins: the SCF complex component TIR1 and the repressor protein AUX/IAA. Ubiquitin moieties are first activated by E1 ligase and added to target proteins by E2 ligase. 

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#Unit 7. System Physiology – Animal

Saltatory conduction is a rapid process that allows myelinated axons to conduct up to 50 times faster than the fastest unmyelinated fibers

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#Unit 7. System Physiology – Animal

Lioyd and Hunt, applies only to sensory nerve fibers and uses a Roman numeral nomenclature of I, II, III, and IV

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#Unit 7. System Physiology – Animal

Neurotrophins 

Necessary for survival and growth of neurons

In the CNS produced by astrocytes

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High affinity Neurotrophins  receptors

Tyrosine kinase associated (Trk) receptors 

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#Unit 7. System Physiology – Animal

Low-affinity NGF receptor

p75 NTR (also called NTR 5 neurotrophin receptor) 

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#Unit 7. System Physiology – Animal

p75 NTR forms heteromeric complexes with the different Trk receptors and enhances Trk receptor signaling