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