+--------------SUBJ:V-N-------------+---------------COMP:V-N(in)--------------+    
      +--------COMP:N-N(of)-------+       |         +----------MOD_ATT:N-N----------+    
      |           +-MOD_ATT:N-ADJ-+       |         |              +---MOD_ATT:N-N--+    
      |           |       +MOD_ATT+       |         |              |         +MOD_AT+    
      |           |       |       |       |         |              |         |      |    
 Expression of __SP__ __NODE__ protein occurs in uterus from postovulatory stage __SP__ .
COMP:N-N(of) (expression,protein)
MOD_ATT:N-ADJ (protein,__SP__)
MOD_ATT:N-ADJ (protein,__NODE__)
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,__SP__)
MOD_ATT:N-N (__SP__,uterus)
MOD_ATT:N-N (__SP__,postovulatory)
MOD_ATT:N-N (__SP__,stage)