+-------------SUBJ:V-N------------+                         
      +----COMP:N-N(of)---+             +----COMP:V-N(in)----+    
      |            +MOD_AT+        +-NEG+           +MOD_ATT:+    
      |            |      |        |    |           |        |    
 Expression of __NODE__ mRNA does not occur in __NODE__0.3 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,__NODE__0.3)