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