( ( These molecules ) ( ( form ( proteins ( in ( ( ( long ( , complex ) ) chains ) ( -LRB- ( ( hundreds ( of ( ( amino acids ) long ) ) ) -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (NNS molecules)) (VP (VBP form) (NP (NP (NNS proteins)) (PP (IN in) (NP (NP (ADJP (JJ long) (, ,) (JJ complex)) (NNS chains)) (PRN (-LRB- -LRB-) (NP (NP (NNS hundreds)) (PP (IN of) (NP (NP (JJ amino) (NNS acids)) (ADVP (RB long))))) (-RRB- -RRB-)))))) (. .)))
These molecules form proteins in long, complex chains (hundreds of amino acids long).
(ROOT (S (NP (NNPS Proteins)) (VP (VBP are) (NP (NP (JJ long) (NNS chains)) (PP (IN of) (NP (JJ amino) (NNS acids))))) (. .)))