This is exactly why levodopa is administered with carbidopa, a dopa decarboxylase inhibitor that isn't able to cross the blood-brain barrier.
这也就是左旋多巴要和卡比多巴共用的原因；卡比多巴是一种不能通过血脑屏障的多巴脱羧酶抑制剂。
Decarboxylase inhibitor
原声例句
Osmosis-神经
中文百科
芳香族L-氨基酸脱羧酶 Aromatic L-amino acid decarboxylase
（重定向自Decarboxylase inhibitor）
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芳香族L-氨基酸脱羧酶（英语：Aromatic L-amino acid decarboxylase，EC4.1.1.28；同义词：多巴脱羧酶、色氨酸脱羧酶、5-羟色氨酸脱羧酶、AAAD）是一个裂合酶。
英语百科
Aromatic L-amino acid decarboxylase 芳香族L-氨基酸脱羧酶
（重定向自Decarboxylase inhibitor）
![Human biosynthesis pathway for trace amines and catecholamines[4][5]
L-Phenylalanine
L-Tyrosine
L-Dopa
Epinephrine
Phenethylamine
p-Tyramine
Dopamine
Norepinephrine
N-Methylphenethylamine
N-Methyltyramine
p-Octopamine
Synephrine
3-Methoxytyramine
AADC
AADC
AADC
PNMT
PNMT
PNMT
PNMT
AAAH
AAAH
COMT
DBH
DBH
In humans, catecholamines and phenethylaminergic trace amines are derived from the amino acid phenylalanine.](/uploads/202501/08/Catecholamine_and_trace_amine_biosynthesis3412.png)
Aromatic L-amino acid decarboxylase (EC4.1.1.28, synonyms: DOPA decarboxylase, tryptophan decarboxylase, 5-hydroxytryptophan decarboxylase, AAAD, AADC) is a lyase enzyme.
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