( ( These ( transmembrane proteins ) ) ( ( ( facilitate ( water passage ) ) ( through ( the membranes ) ) ) . ) )
(ROOT (S (NP (DT These) (JJ transmembrane) (NNS proteins)) (VP (VBP facilitate) (NP (NN water) (NN passage)) (PP (IN through) (NP (DT the) (NNS membranes)))) (. .)))
These transmembrane proteins facilitate water passage through the membranes.
(ROOT (S (NP (JJ Transmembrane) (NNS proteins)) (VP (VBP span) (NP (DT the) (JJ entire) (NN plasma) (NN membrane))) (. .)))