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