( ( An ( amino acid ) ) ( ( ( is so ) ( named ( because ( it ( has ( ( ( ( ( both ( a ( basic ( amine group,-NH ) ) ) ) 2 ) , ) and ) ( an ( acidic ( carboxyl group,-COOH ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT An) (JJ amino) (NN acid)) (VP (VBZ is) (ADVP (RB so)) (VP (VBN named) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ has) (NP (NP (NP (PDT both) (DT a) (JJ basic) (JJ amine) (NNS group,-NH)) (NP (CD 2))) (, ,) (CC and) (NP (DT an) (JJ acidic) (JJ carboxyl) (NN group,-COOH)))))))) (. .)))
An amino acid is so named because it has both a basic amine group,-NH 2 , and an acidic carboxyl 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)))) (. .)))