+----------------COMP:V-N(in)----------------+    
      +----------------SUBJ:V-N----------------+        +------------MOD_ATT:N-N------------+    
      +-------COMP:N-N(of)-------+             |        |               +----MOD_ATT:N-N----+    
      |           +-MOD_ATT:N-ADJ+             |        |               |   +-MOD_ATT:N-ADJ-+    
      |           |       +MOD_AT+        +-NEG+        |               |   |      +MOD_ATT:+    
      |           |       |      |        |    |        |               |   |      |        |    
 Expression of __SP__ __NODE__ mRNA does not occur in brain from 150.5 day old embryonic __SP__ .
COMP:N-N(of) (expression,mRNA)
MOD_ATT:N-ADJ (mRNA,__SP__)
MOD_ATT:N-ADJ (mRNA,__NODE__)
SUBJ:V-N (occur,expression)
NEG (occur,not)
COMP:V-N(in) (occur,__SP__)
MOD_ATT:N-N (__SP__,brain)
MOD_ATT:N-N (__SP__,day)
MOD_ATT:N-ADJ (__SP__,old)
MOD_ATT:N-ADJ (__SP__,embryonic)