( Phospholipids ( ( are ( ( the ( major component ) ) ( of ( cell membranes ) ) ) ) . ) )
(ROOT (S (NP (NNS Phospholipids)) (VP (VBP are) (NP (NP (DT the) (JJ major) (NN component)) (PP (IN of) (NP (NN cell) (NNS membranes))))) (. .)))
Phospholipids are the major component of cell membranes.
(ROOT (S (NP (NNS Phospholipids)) (VP (VBP are) (NP (NP (DT the) (JJ main) (NN component)) (PP (IN of) (NP (DT the) (NN cell) (NN membrane))))) (. .)))