( ( ( Lipids - ) ( ( lipid molecules ) ( ( ( tend ( to ( ( ( ` ( unite ' ) ) or ) coalesce ) ) ) and ) ( ( are only ) ( accessible ( to ( ( ( lipase ( at ( the ( lipid-water interface ) ) ) ) - ) ( because ( lipids ( are hydrophobic ) ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NNS Lipids)) (: -) (S (NP (NN lipid) (NNS molecules)) (VP (VP (VBP tend) (S (VP (TO to) (VP (VP (`` `) (VB unite) ('' ')) (CC or) (VP (VB coalesce)))))) (CC and) (VP (VBP are) (ADVP (RB only)) (ADJP (JJ accessible) (S (VP (TO to) (VP (VB lipase) (PP (IN at) (NP (DT the) (JJ lipid-water) (NN interface))) (: -) (SBAR (IN because) (S (NP (NNS lipids)) (VP (VBP are) (ADJP (JJ hydrophobic)))))))))))) (. .)))
Lipids- lipid molecules tend to 'unite' or coalesce and are only accessible to lipase at the lipid-water interface- because lipids are hydrophobic.
(ROOT (S (NP (NNS Lipids)) (VP (VBP are) (VP (VBN broken) (PRT (RP down)) (PP (IN by) (NP (NNS lipases))))) (. .)))