+-----------------COMP:V-N(in)-----------------+    
                                        |          +-----------MOD_ATT:N-ADJ-----------+    
      +-------------SUBJ:V-N------------+          |             +----MOD_ATT:N-ADJ----+    
      +----COMP:N-N(of)---+             |          |             |          +MOD_ATT:N-+    
      |            +MOD_AT+        +-NEG+          |             |          |    +MOD_A+    
      |            |      |        |    |          |             |          |    |     |    
 Expression of __NODE__ mRNA does not occur in confluent predifferentiated 3T3 F442A cells .
COMP:N-N(of) (expression,mRNA)
MOD_ATT:N-ADJ (mRNA,__NODE__)
SUBJ:V-N (occur,expression)
NEG (occur,not)
COMP:V-N(in) (occur,cell)
MOD_ATT:N-ADJ (cell,confluent)
MOD_ATT:N-ADJ (cell,predifferentiated)
MOD_ATT:N-ADJ (cell,3T3)
MOD_ATT:N-N (cell,F442A)