( ( The ( amino ( acid l-tyrosine ) ) ) ( ( is ( ( a precursor ) ( ( to ( ( ( the ( all-important ( T3 hormone ) ) ) and ) ( a precursor ) ) ) ( to ( ( ( the ( ( stimulatory neurotransmitters ) epinephrine ) ) , ) ( norepinephrine ( , ( and dopamine ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ amino) (NN acid) (NN l-tyrosine)) (VP (VBZ is) (NP (NP (DT a) (NN precursor)) (PP (PP (TO to) (NP (NP (DT the) (JJ all-important) (NN T3) (NN hormone)) (CC and) (NP (DT a) (NN precursor)))) (PP (TO to) (NP (NP (DT the) (ADJP (RB stimulatory) (JJ neurotransmitters)) (NN epinephrine)) (, ,) (ADJP (JJ norepinephrine) (, ,) (CC and) (JJ dopamine))))))) (. .)))
The amino acid l-tyrosine is a precursor to the all-important T3 hormone and a precursor to the stimulatory neurotransmitters epinephrine, norepinephrine, and dopamine.
(ROOT (S (NP (NNS Catecholamines)) (VP (VBP are) (NP (NP (DT a) (NN class)) (PP (IN of) (NP (JJ amine) (NNS hormones))) (SBAR (WHNP (WHNP (DT that)) (NP (WRB when) (JJ synthesised))) (S (VP (VBP form) (NP (DT the) (JJ amino) (NN acid) (NN tyrosine))))))) (. .)))