Question

Which catecholamine is made by the action of tyrosine hydroxylase and aromatic amino acid decarboxylase? (Assume that a biologically relevant molarity of all substrates for both tyrosine hydroxylase and aromatic amino acid decarboxylase are available.)

Answer 1

Answer:

Catecholamine made by the action of tyrosine hydroxylase and aromatic amino acid decarboxylase is DOPAMINE

Explanation:

Catecholamines are formed from the amino acid - tyrosine. Food which are rich in protein are sources of Tyrosine. Also, the body system can produce tyrosine by adding hydroxyl group -OH to phenylalanine. Cells that secret catechomines such as dopamine use several reactions (catalyzed by tyrosine hydroxylase and amino acid decarboxylase) to convert tyrosine in series to L-DOPA and then to dopamine. L-DOPA is L-3,4-dihydroxyphenylalanine. The enzyme - tyrosine hydroxylase changed tyrosine to L-DOPA. While L-DOPA is changed into dopamine by the enzyme - amino acid decarboxylase.