( ( A ( protein molecule ) ) ( ( consists ( of ( ( long ( twisted ( ( strands or ) chains ) ) ) ( of ( amino acids ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN protein) (NN molecule)) (VP (VBZ consists) (PP (IN of) (NP (NP (JJ long) (JJ twisted) (NNS strands) (CC or) (NNS chains)) (PP (IN of) (NP (JJ amino) (NNS acids)))))) (. .)))
A protein molecule consists of long twisted strands or chains of amino acids.
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN protein)) (VP (VBZ is) (VP (VBN formed) (SBAR (WHADVP (WRB when)) (S (NP (JJ amino) (NNS acids)) (VP (VBP are) (VP (VBN linked) (ADVP (RB together)) (PP (IN in) (NP (DT a) (JJ long) (NN chain))))))))) (. .)))