( ( Apo E ) ( ( ( ( is ( ( a component ) ( of ( several lipoproteins ) ) ) ) and ) ( ( plays ( an ( important role ) ) ) ( in ( lipid metabolism ) ) ) ) . ) )
(ROOT (S (NP (NNP Apo) (NNP E)) (VP (VP (VBZ is) (NP (NP (DT a) (NN component)) (PP (IN of) (NP (JJ several) (NNS lipoproteins))))) (CC and) (VP (VBZ plays) (NP (DT an) (JJ important) (NN role)) (PP (IN in) (NP (NN lipid) (NN metabolism))))) (. .)))
Apo E is a component of several lipoproteins and plays an important role in lipid metabolism.
(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))))) (. .)))