+------------------SUBJ:V-N-----------------+                      
      +--------COMP:N-N(of)-------+               +---COMP:V-N(in)--+    
      |           +-MOD_ATT:N-ADJ-+               |        +MOD_ATT:+    
      |           |       +MOD_ATT+          +-NEG+        |   +MOD_+    
      |           |       |       |          |    |        |   |    |    
 Expression of __SP__ __NODE__ protein does not occur in Ccrf cem cells .
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,cell)
MOD_ATT:N-N (cell,Ccrf)
MOD_ATT:N-N (cell,Cem)