( ( ( ( enzymes , ) ( for example ) ) , ) ( ( are ( ( protein catalysts ) ( that ( ( speed up ) ( ( biochemical reactions ) ( in ( the body ) ) ) ) ) ) ) ; ) )
(ROOT (S (NP (NP (NNS enzymes)) (, ,) (PP (IN for) (NP (NN example))) (, ,)) (VP (VBP are) (NP (NP (NN protein) (NNS catalysts)) (SBAR (WHNP (WDT that)) (S (VP (VB speed) (PRT (RP up)) (NP (NP (JJ biochemical) (NNS reactions)) (PP (IN in) (NP (DT the) (NN body))))))))) (: ;)))
enzymes, for example, are protein catalysts that speed up biochemical reactions in the body;
(ROOT (S (NP (NNS Enzymes)) (VP (VP (VB speed) (PRT (RP up)) (NP (NP (DT the) (NN rate)) (PP (IN of) (NP (DT a) (JJ specific) (NN chemical) (NN reaction))))) (CC and) (VP (VBP are) (ADVP (RB therefore)) (VP (VBN known) (PP (IN as) (NP (JJ biochemical) (NNS catalysts)))))) (. .)))