+----------SUBJ:V-N----------+                                 
      +COMP:N-N(of)+          +-NEG+COMP:V-N+                        
      |            |          |    |        |                        
 Expression of __NODE__ does not occur in liver from adult organism .
COMP:N-N(of) (expression,__NODE__)
SUBJ:V-N (occur,expression)
NEG (occur,not)
COMP:V-N(in) (occur,liver)