( ( ( The ( cellular functions ) ) ( under investigation ) ) ( ( are ( the ( ability ( to ( ( remodel ( matrix proteins ) ) ( ( ( by phagocytosis ) and ) ( by contraction ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ cellular) (NNS functions)) (PP (IN under) (NP (NN investigation)))) (VP (VBP are) (NP (DT the) (NN ability) (S (VP (TO to) (VP (VB remodel) (NP (NN matrix) (NNS proteins)) (PP (PP (IN by) (NP (NNS phagocytosis))) (CC and) (PP (IN by) (NP (NN contraction))))))))) (. .)))
The cellular functions under investigation are the ability to remodel matrix proteins by phagocytosis and by contraction.
(ROOT (S (NP (NNS Phagocytosis)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (JJ cellular) (NN eating))))) (. .)))