( ( ( ( ( Active ( transport ( Transmembrane proteins ) ) ) , ) ( called transporters ) ) , ) ( ( use ( ( ( the energy ) ( of ATP ) ) ( to ( ( force ( ( ( ions or ) small ) molecules ) ) ( through ( ( the membrane ) ( against ( their ( concentration gradient ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Active) (NN transport) (NN Transmembrane) (NNS proteins)) (, ,) (VP (VBN called) (NP (NNS transporters))) (, ,)) (VP (VBP use) (S (NP (NP (DT the) (NN energy)) (PP (IN of) (NP (NNP ATP)))) (VP (TO to) (VP (VB force) (NP (ADJP (JJ ions) (CC or) (JJ small)) (NNS molecules)) (PP (IN through) (NP (NP (DT the) (NN membrane)) (PP (IN against) (NP (PRP$ their) (NN concentration) (NN gradient))))))))) (. .)))
Active transport Transmembrane proteins, called transporters, use the energy of ATP to force ions or small molecules through the membrane against their concentration gradient.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT the) (NN movement)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN across) (NP (DT a) (ADJP (JJ membrane) (PP (IN without) (NP (NP (DT the) (NN input)) (PP (IN of) (NP (NN energy)))))) (JJ passive) (NN transport))))))) (. .)))