+--------------------SUBJ:V-N-------------------+                 
      +----------COMP:N-N(of)---------+               |                 
      |            +---MOD_ATT:N-ADJ--+               +COMP:V-N(in)+    
      |            |         +MOD_ATT:+          +-NEG+       +MOD_+    
      |            |         |        |          |    |       |    |    
 Expression of __NODE__ [__NODE__] protein does not occur in 32D cells .
COMP:N-N(of) (expression,protein)
MOD_ATT:N-ADJ (protein,__NODE__)
MOD_ATT:N-N (protein,[__NODE__])
SUBJ:V-N (occur,expression)
NEG (occur,not)
COMP:V-N(in) (occur,cell)
MOD_ATT:N-ADJ (cell,32D)