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