+---------------SUBJ:V-N---------------+              
      +---------COMP:N-N(of)---------+       |              
      |              +--MOD_ATT:N-N--+       |              
      |              |      +MOD_ATT:+       +COMP:V-N(+    
      |              |      |        |       |         |    
 Expression of SREBP 2 [__NODE__] protein occurs in tissue .
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,toilet)