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