( ( ( ( ( ( ( The activities ) ( of ( hundreds ( of proteins ) ) ) ) ( must ( be ( coordinated ( to ( create ( these ( highly-structured units ) ) ) ) ) ) ) ) , ) and ) ( titin ( plays ( ( an ( important role ) ) ( in ( the ( assembly process ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT The) (NNS activities)) (PP (IN of) (NP (NP (NNS hundreds)) (PP (IN of) (NP (NNS proteins)))))) (VP (MD must) (VP (VB be) (VP (VBN coordinated) (S (VP (TO to) (VP (VB create) (NP (DT these) (JJ highly-structured) (NNS units))))))))) (, ,) (CC and) (S (NP (NN titin)) (VP (VBZ plays) (NP (NP (DT an) (JJ important) (NN role)) (PP (IN in) (NP (DT the) (NN assembly) (NN process)))))) (. .)))
The activities of hundreds of proteins must be coordinated to create these highly-structured units, and titin plays an important role in the assembly process.
(ROOT (S (NP (DT The) (ADJP (JJS largest) (VBN known)) (NNS proteins)) (VP (VBP are) (VP (VBN called) (NP (NNS titins)))) (. .)))