( ( Recall ( that ( ( ( the ( major component ) ) ( of ( a ( cell membrane ) ) ) ) ( is ( the ( phospholipid bilayer ) ) ) ) ) ) . )
(ROOT (S (VP (VB Recall) (SBAR (IN that) (S (NP (NP (DT the) (JJ major) (NN component)) (PP (IN of) (NP (DT a) (NN cell) (NN membrane)))) (VP (VBZ is) (NP (DT the) (JJ phospholipid) (NN bilayer)))))) (. .)))
Recall that the major component of a cell membrane is the phospholipid bilayer.
(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))))) (. .)))