( ( ( ( ( ( Each ( amino acid ) ) ( has ( ( ( a ( carboxylic group ) ) and ) ( an ( amine group ) ) ) ) ) , ) and ) ( ( amino acids ) ( ( link ( to ( one another ) ) ) ( to ( ( ( form ( a chain ) ) ( by ( a ( dehydration reaction ) ) ) ) ( by ( ( joining ( ( the ( carboxyl group ) ) ( of ( one ( amino acid ) ) ) ) ) ( to ( ( the ( amine group ) ) ( of ( the next ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT Each) (JJ amino) (NN acid)) (VP (VBZ has) (NP (NP (DT a) (JJ carboxylic) (NN group)) (CC and) (NP (DT an) (JJ amine) (NN group))))) (, ,) (CC and) (S (NP (JJ amino) (NNS acids)) (VP (VBP link) (PP (TO to) (NP (CD one) (DT another))) (S (VP (TO to) (VP (VB form) (NP (DT a) (NN chain)) (PP (IN by) (NP (DT a) (NN dehydration) (NN reaction))) (PP (IN by) (S (VP (VBG joining) (NP (NP (DT the) (JJ carboxyl) (NN group)) (PP (IN of) (NP (CD one) (JJ amino) (NN acid)))) (PP (TO to) (NP (NP (DT the) (JJ amine) (NN group)) (PP (IN of) (NP (DT the) (JJ next))))))))))))) (. .)))
Each amino acid has a carboxylic group and an amine group, and amino acids link to one another to form a chain by a dehydration reaction by joining the carboxyl group of one amino acid to the amine group of the next.
(ROOT (S (NP (NNP Amino) (NNS acids)) (VP (VBP contain) (NP (PDT both) (NP (DT a) (JJ carboxylic) (JJ acid) (NN group)) (CC and) (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (JJ amine) (NN group)))) (. .)))