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