( ( The problem ) ( ( lies ( with ( ( the ( membrane ( transport protein ) ) ) ( that ( ( ( moves ( chloride ions ) ) out ) ( of cells ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN problem)) (VP (VBZ lies) (PP (IN with) (NP (NP (DT the) (JJ membrane) (NN transport) (NN protein)) (SBAR (WHNP (WDT that)) (S (VP (VBZ moves) (NP (NN chloride) (NNS ions)) (PRT (RP out)) (PP (IN of) (NP (NNS cells))))))))) (. .)))
The problem lies with the membrane transport protein that moves chloride ions out of cells.
(ROOT (S (NP (DT The) (NN term) (JJ passive) (NN transport)) (VP (VBZ describes) (NP (DT a) (NN way)) (SBAR (IN that) (S (NP (JJ small) (NNS molecules) (CC or) (NNS ions)) (VP (VBP move) (PP (IN across) (NP (NP (DT the) (NN cell)) (VP (VBN membrane) (PP (IN without) (NP (NP (NN input)) (PP (IN of) (NP (NN energy))))) (PP (IN by) (NP (DT the) (NN cell)))))))))) (. .)))