( ( The ( human body ) ) ( ( can NOT ) ( ( ( ( manufacture proteins ) directly ) ( from ( ( fats and ) carbohydrates ) ) ) ( because ( most ( of ( ( these ( organic ( compounds lack ) ) ) ( -LRB- ( ( 1 . ) -RRB- ) ) ) ) ) ) ) ) )
(ROOT (S (NP (DT The) (JJ human) (NN body)) (VP (MD can) (ADVP (RB NOT)) (VP (VB manufacture) (NP (NNS proteins)) (ADVP (RB directly)) (PP (IN from) (NP (NNS fats) (CC and) (NNS carbohydrates))) (PP (IN because) (NP (NP (JJS most)) (PP (IN of) (NP (NP (DT these) (JJ organic) (NNS compounds) (NN lack)) (PRN (-LRB- -LRB-) (FRAG (NP (CD 1)) (. .)) (-RRB- -RRB-))))))))))
The human body can NOT manufacture proteins directly from fats and carbohydrates because most of these organic compounds lack (1.)
(ROOT (S (NP (NNS Carbohydrates)) (VP (VBP are) (NP (NP (DT the) (ADJP (RBS most) (JJ common)) (NN type)) (PP (IN of) (NP (JJ organic) (NN compound))))) (. .)))