( It ( ( 's ( ( ( ( a combination ) ( of ( ( ( ( ( the ( essential ( amino ( acid methionine ) ) ) ) , ) and ) ATP ) ( -LRB- ( ( adenosine triphosphate ) -RRB- ) ) ) ) ) , ) ( which ( is ( ( ( ( the ( ( most important ) ( energy molecule ) ) ) ( in ( the body ) ) ) and ) ( ( the ( ( most important ) molecule ) ) ( in ( living things ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ 's) (NP (NP (DT a) (NN combination)) (PP (IN of) (NP (NP (DT the) (JJ essential) (JJ amino) (NN acid) (NN methionine)) (, ,) (CC and) (NP (NNP ATP)) (PRN (-LRB- -LRB-) (NP (JJ adenosine) (NN triphosphate)) (-RRB- -RRB-)))) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (NP (NP (NP (DT the) (ADJP (RBS most) (JJ important)) (NN energy) (NN molecule)) (PP (IN in) (NP (DT the) (NN body)))) (CC and) (NP (NP (DT the) (ADJP (RBS most) (JJ important)) (NN molecule)) (PP (IN in) (NP (VBG living) (NNS things)))))))))) (. .)))
It's a combination of the essential amino acid methionine, and ATP (adenosine triphosphate), which is the most important energy molecule in the body and the most important molecule in living things.
(ROOT (S (NP (NP (NNP Atp)) (CC or) (NP (JJ adenozine) (NN triphosphate))) (VP (VBZ is) (VP (VBN used) (PP (IN for) (NP (JJS most) (NN energy) (NNS functions))) (PP (IN in) (NP (NNS organisms))))) (. .)))