+-----------------SUBJ:V-N-----------------+                       
      +-----------COMP:N-N(of)-----------+       |                       
      |           +-----MOD_ATT:N-ADJ----+       +---COMP:V-N(in)---+    
      |           |      +-MOD_ATT:N-ADJ-+       |       +MOD_ATT:N-+    
      |           |      |       +MOD_ATT+       |       |    +MOD_A+    
      |           |      |       |       |       |       |    |     |    
 Expression of active __SP__ __NODE__ protein occurs in 3T3 F442A cells .
COMP:N-N(of) (expression,protein)
MOD_ATT:N-ADJ (protein,active)
MOD_ATT:N-ADJ (protein,__SP__)
MOD_ATT:N-ADJ (protein,__NODE__)
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,cell)
MOD_ATT:N-ADJ (cell,3T3)
MOD_ATT:N-N (cell,F442A)