( ( ( Two tyrosines ) ( separated ( by ( ( ( ( ( a ( single ( amino acid ) ) ) , ) typically ) ( ( ( valine or ) another ) tyrosine ) ) , ) ) ) ) ( ( form ( a ( short ( intra-molecular ( diphenylether crosslink ) ) ) ) ) . ) )
(ROOT (S (NP (NP (CD Two) (NNS tyrosines)) (VP (VBN separated) (PP (IN by) (NP (NP (DT a) (JJ single) (JJ amino) (NN acid)) (, ,) (ADVP (RB typically)) (NP (ADJP (JJ valine) (CC or) (DT another)) (NN tyrosine)) (, ,))))) (VP (VBP form) (NP (DT a) (JJ short) (JJ intra-molecular) (NN diphenylether) (NN crosslink))) (. .)))
Two tyrosines separated by a single amino acid, typically valine or another tyrosine, form a short intra-molecular diphenylether crosslink.
(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))))))) (. .)))