+--MOD_ATT:N-N-+                                            
  |      +MOD_ATT+SUBJ:V_PASS+COMP:V_PASS-N+COMP:N-N(of)+     
  |      |       |           |             |            |     
 GO : __SP__ __NODE__ is involved in modification of protein .
MOD_ATT:N-N (__NODE__,go)
MOD_ATT:N-ADJ (__NODE__,__SP__)
SUBJ:V_PASS-N (involve,__NODE__)
COMP:V_PASS-N(in) (involve,modification)
COMP:N-N(of) (modification,protein)