+---------------SUBJ:V-N---------------+                      
      +---------COMP:N-N(of)---------+       |                      
      |              +--MOD_ATT:N-N--+       +---COMP:V-N(in)--+    
      |              |      +MOD_ATT:+       |          +MOD_AT+    
      |              |      |        |       |          |      |    
 Expression of SREBP 2 [__NODE__] protein occurs in cultured cells .
COMP:N-N(of) (expression,protein)
MOD_ATT:N-N (protein,2)
MOD_ATT:N-N (protein,[__NODE__])
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,cell)
MOD_ATT:N-ADJ (cell,cultured)