+------------------SUBJ:V-N-----------------+                                  
      +--------COMP:N-N(of)-------+               +---------COMP:V-N(in)--------+    
      |           +-MOD_ATT:N-ADJ-+               |         +---MOD_ATT:N-ADJ---+    
      |           |       +MOD_ATT+          +-NEG+         |       +MOD_ATT:N-N+    
      |           |       |       |          |    |         |       |           |    
 Expression of __SP__ __NODE__ protein does not occur in carotid artery from __SP__ .
COMP:N-N(of) (expression,protein)
MOD_ATT:N-ADJ (protein,__SP__)
MOD_ATT:N-ADJ (protein,__NODE__)
SUBJ:V-N (occur,expression)
NEG (occur,not)
COMP:V-N(in) (occur,__SP__)
MOD_ATT:N-ADJ (__SP__,carotid)
MOD_ATT:N-N (__SP__,artery)