+MOD_ATT+--SUBJ:V_PASS-N-+COMP:V_PAS+COMP:N-N(+    
    |       |                |          |         |    
 __SP__ __NODE__ gene is involved in weight of __SP__ .
MOD_ATT:N-ADJ (__NODE__,__SP__)
SUBJ:V_PASS-N (involve,__NODE__)
COMP:V_PASS-N(in) (involve,weight)
COMP:N-N(of) (weight,__SP__)