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