( ( Another simulation ) ( ( ( focused ( on ( ion channels ) ) ) ( in membranes ) ) . ) )
(ROOT (S (NP (DT Another) (NN simulation)) (VP (VBD focused) (PP (IN on) (NP (NN ion) (NNS channels))) (PP (IN in) (NP (NNS membranes)))) (. .)))
Another simulation focused on ion channels in membranes.
(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)))))) (. .)))