5-hydroxymethylcytosine (5hmC) is now novel epigenetic marks. The “teneleven translocation 1-3” or Tet1-3 proteinsare DNA TET hydroxylase enzymes that can convert 5mC to 5hmC, and can further convert 5hmC to 5-formylcytosine (5fC) and then 5- carboxylcytosine (5caC) in successive reactions.

TLS Online TPP Program

#Id: 6512

#Unit 7. System Physiology – Animal

DOPA is converted to dopamine in the cytoplasm of the cells by DOPA decarboxylase (amino acid decarboxylase)

TLS Online TPP Program

#Id: 6513

#Unit 7. System Physiology – Animal

DOPA is converted to dopamine in the cytoplasm of the cells by DOPA decarboxylase (amino acid decarboxylase)

TLS Online TPP Program

#Id: 6514

#Unit 7. System Physiology – Animal

Dopamine is converted to norepinephrine by dopamine β -hydroxylase

TLS Online TPP Program

#Id: 6515

#Unit 7. System Physiology – Animal

Norepinephrine is the only small-molecule transmitter that is synthesized in synaptic vesicles

TLS Online TPP Program

#Id: 6516

#Unit 7. System Physiology – Animal

Epinephrine is formed by methylation of norepinephrine

TLS Online TPP Program

#Id: 6517

#Unit 7. System Physiology – Animal

Phenylethanolamine-N-methyltransferase catalyzes the formation of epinephrine from norepinephrine, is found in appreciable quantities only in the brain and the adrenal medulla