( GLUT1 ( ( ( facilitates ( ( the transport ) ( of glucose ) ) ) ( across ( ( the ( plasma membranes ) ) ( of ( mammalian cells ) ) ) ) ) . ) )
(ROOT (S (NP (NNP GLUT1)) (VP (VBZ facilitates) (NP (NP (DT the) (NN transport)) (PP (IN of) (NP (NN glucose)))) (PP (IN across) (NP (NP (DT the) (NN plasma) (NNS membranes)) (PP (IN of) (NP (JJ mammalian) (NNS cells)))))) (. .)))
GLUT1 facilitates the transport of glucose across the plasma membranes of mammalian cells.
(ROOT (S (NP (NNP Passive) (NN transport)) (VP (VBZ occurs) (SBAR (WHADVP (WRB when)) (S (NP (NNS substances)) (VP (VBP cross) (NP (DT the) (NN plasma) (NN membrane)) (PP (IN without) (NP (NP (DT any) (NN input)) (PP (IN of) (NP (NN energy))))) (PP (IN from) (NP (DT the) (NN cell))))))) (. .)))