( ( ( the regulation ) ( of plasma ) ) ( ( ( membrane C1-permeability ) ( by ( ion channels ) ) ) ; ) )
(ROOT (S (NP (NP (DT the) (NN regulation)) (PP (IN of) (NP (NN plasma)))) (VP (VBD membrane) (NP (NNS C1-permeability)) (PP (IN by) (NP (NN ion) (NNS channels)))) (: ;)))
the regulation of plasma membrane C1-permeability by ion channels;
(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)))))) (. .)))