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TLS Online TPP Program

#Id: 8181

Catalase uses the H2O2 to oxidize a variety of other substrates (formic acid, formaldehyde, and alcohol) by the “peroxidation” reaction.

#Unit 2. Cellular Organization #Peroxisome & Lysosome #Part B Pointers
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TLS Online TPP Program

#Id: 6505

#Unit 7. System Physiology – Animal

Principal catecholamines synthesized by the adrenal medulla:
Norepinephrine
Epinephrine
Dopamine
TLS Online TPP Program

#Id: 6506

#Unit 7. System Physiology – Animal

Norepinephrine is formed by hydroxylation and decarboxylation of tyrosine
TLS Online TPP Program

#Id: 6507

#Unit 7. System Physiology – Animal

Some of the tyrosine is formed from phenylalanine, by Phenylalanine hydroxylase
TLS Online TPP Program

#Id: 6508

#Unit 7. System Physiology – Animal

Tetrahydrobiopterin (BH4) is a cofactor for tyrosine hydroxylase and phenylalanine hydroxylase
TLS Online TPP Program

#Id: 6509

#Unit 7. System Physiology – Animal

Phenylketonuria (PKU) 
Mutation of the gene for phenylalanine hydroxylase
Caused by tetrahydrobiopterin (BH4) deficiency
TLS Online TPP Program

#Id: 6510

#Unit 7. System Physiology – Animal

Tyrosine is transported into catecholamine-secreting neurons via a Na+ - dependent carrier