( ( Amino acids ) ( ( are ( molecules ( that ( contain ( ( ( ( ( ( at least ) one ) ( amine group ) ) ( -LRB- ( ( - NH2 ) -RRB- ) ) ) and ) ( ( ( ( at least ) one ) ( carboxylic ( acid group ) ) ) ( -LRB- ( ( - COOH ) -RRB- ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Amino) (NNS acids)) (VP (VBP are) (NP (NP (NNS molecules)) (SBAR (WHNP (WDT that)) (S (VP (VBP contain) (NP (NP (NP (QP (IN at) (JJS least) (CD one)) (NN amine) (NN group)) (PRN (-LRB- -LRB-) (NP (NNP -) (NNP NH2)) (-RRB- -RRB-))) (CC and) (NP (NP (QP (IN at) (JJS least) (CD one)) (JJ carboxylic) (NN acid) (NN group)) (PRN (-LRB- -LRB-) (NP (NNP -) (NNP COOH)) (-RRB- -RRB-))))))))) (. .)))
Amino acids are molecules that contain at least one amine group (-NH2) and at least one carboxylic acid group (-COOH).
(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)))) (. .)))