( ( If ( one ( gently ( heats ( ( a mixture ) ( of ( those ( individual ( amino acids ) ) ) ) ) ) ) ) ) ( , ( proteins ( ( are ( ( formed -- ) ( ( long chains ) ( ( whose links ) ( are ( ( the ( little ( amino acid ) ) ) ( building blocks ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (PRP one)) (ADVP (RB gently)) (VP (VBZ heats) (NP (NP (DT a) (NN mixture)) (PP (IN of) (NP (DT those) (JJ individual) (JJ amino) (NNS acids))))))) (, ,) (NP (NNS proteins)) (VP (VBP are) (VP (VBN formed) (: --) (NP (NP (JJ long) (NNS chains)) (SBAR (WHNP (WP$ whose) (NNS links)) (S (VP (VBP are) (NP (NP (DT the) (JJ little) (JJ amino) (NN acid)) (VP (VBG building) (NP (NNS blocks)))))))))) (. .)))
If one gently heats a mixture of those individual amino acids, proteins are formed -- long chains whose links are the little amino acid building blocks.
(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))))))))) (. .)))