+MOD_ATT+MOD_PRED:N-+COMP:ADJ-N(fo+COMP:N-N(of)+     
     |       |           |             |            |     
 __NODE__ protein is necessary for synthesis of __NODE__ .
MOD_ATT:N-ADJ (protein,__NODE__)
MOD_PRED:N-ADJ (protein,necessary)
COMP:ADJ-N(for) (necessary,synthesis)
COMP:N-N(of) (synthesis,__NODE__)