( ( ( enzyme ( biological catalysts ) ) ( in ( ( the form ) ( of ( proteins ( in ( ( the body ) ( that ( ( speed up ) ( chemical reactions ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB enzyme) (NP (JJ biological) (NNS catalysts)) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (NP (NNS proteins)) (PP (IN in) (NP (NP (DT the) (NN body)) (SBAR (WHNP (WDT that)) (S (VP (VB speed) (PRT (RP up)) (NP (NN chemical) (NNS reactions)))))))))))) (. .)))
enzyme biological catalysts in the form of proteins in the body that speed up chemical reactions.
(ROOT (S (PP (IN In) (NP (DT a) (JJ biological) (NN reaction))) (, ,) (NP (NNS proteins)) (VP (VBP act) (PP (IN as) (NP (NNS catalysts)))) (. .)))