( ( This protein ) ( ( plays ( ( a role ) ( in ( lipid regulation ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN protein)) (VP (VBZ plays) (NP (NP (DT a) (NN role)) (PP (IN in) (NP (NN lipid) (NN regulation))))) (. .)))
This protein plays a role in lipid regulation.
(ROOT (S (NP (NNS Lipids)) (VP (VBP play) (NP (NP (JJ several) (JJ important) (NNS roles)) (PP (IN in) (NP (DT the) (JJ human) (NN body))))) (. .)))