+------------------SUBJ:V-N-----------------+                                         
      +--------COMP:N-N(of)-------+               +-----------COMP:V-N(in)-----------+      
      |           +-MOD_ATT:N-ADJ-+               |              +---MOD_ATT:N-ADJ---+      
      |           |       +MOD_ATT+          +-NEG+              |           +MOD_ATT+      
      |           |       |       |          |    |              |           |       |      
 Expression of __SP__ __NODE__ protein does not occur in undifferentiated __SP__ monocytes .
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,monocyte)
MOD_ATT:N-ADJ (monocyte,undifferentiated)
MOD_ATT:N-ADJ (monocyte,__SP__)