( ( ( The ( central axis ) ) ( of ( an ( amino ( acid molecule ) ) ) ) ) ( ( is ( characteristically ( composed ( of ( ( a carbon ) ( with ( ( ( ( a ( carboxyl group ) ) ( on ( one end ) ) ) and ) ( ( an ( amine group ) ) ( on ( the ( other end ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ central) (NNS axis)) (PP (IN of) (NP (DT an) (JJ amino) (NN acid) (NN molecule)))) (VP (VBZ is) (ADJP (RB characteristically) (JJ composed) (PP (IN of) (NP (NP (DT a) (NN carbon)) (PP (IN with) (NP (NP (NP (DT a) (JJ carboxyl) (NN group)) (PP (IN on) (NP (CD one) (NN end)))) (CC and) (NP (NP (DT an) (JJ amine) (NN group)) (PP (IN on) (NP (DT the) (JJ other) (NN end)))))))))) (. .)))
The central axis of an amino acid molecule is characteristically composed of a carbon with a carboxyl group on one end and an amine group on the other end.
(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)))) (. .)))