( ( Ion channels ) ( ( permit ( ( water ( soluble ( ( molecules and ) ions ) ) ) ( to ( cross ( the ( plasma membrane ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Ion) (NNS channels)) (VP (VBP permit) (NP (NP (NN water) (JJ soluble) (NNS molecules) (CC and) (NNS ions)) (SBAR (S (VP (TO to) (VP (VB cross) (NP (DT the) (NN plasma) (NN membrane)))))))) (. .)))
Ion channels permit water soluble molecules and ions to cross the plasma membrane.
(ROOT (NP (NP (NP (NNP Ion) (NNP channels) (NNP facilitate)) (PRN (-LRB- -LRB-) (PRP s) (-RRB- -RRB-))) (NP (NP (DT the) (NN diffusion)) (PP (IN of) (NP (NP (NNS ions)) (PP (IN across) (NP (DT a) (NN membrane)))))) (. .)))