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

     +------SUBJ:V-N-----+                                       
     +---OBJ:V-N---+     +-------------OBJ:V-N-------------+     
     |       +SUBJ:+     +COMP:V-N(in)+COMP:N-N(of)+       |     
     |       |     |     |            |            |       |     
 __NODE__ protein is involved in expression of __NODE__ protein .
OBJ:V-N (be,__NODE__)
SUBJ:V-N (be,protein)
SUBJ:V-N (involve,__NODE__)
COMP:V-N(in) (involve,expression)
OBJ:V-N (involve,protein)
COMP:N-N(of) (expression,__NODE__)