( ( ( ( Both LDL ) and ) ( its ( receptor form ) ) ) ( ( vesicles ( within ( ( a cell ) ( via endocytosis ) ) ) ) . ) )
(ROOT (S (NP (NP (DT Both) (NNP LDL)) (CC and) (NP (PRP$ its) (NN receptor) (NN form))) (VP (VBZ vesicles) (PP (IN within) (NP (NP (DT a) (NN cell)) (PP (IN via) (NP (NNS endocytosis)))))) (. .)))
Both LDL and its receptor form vesicles within a cell via endocytosis.
(ROOT (S (NP (NNS Vesicles)) (VP (VBP are) (VP (VBN used) (PP (IN during) (NP (NNS endocytosis))) (S (VP (TO to) (VP (VB allow) (S (NP (NNS molecules)) (VP (TO to) (VP (VB enter) (NP (DT the) (NN cell)))))))))) (. .)))