+------------------SUBJ:V-N------------------+    
      +-------COMP:N-N(of)------+                  |    
      |            +MOD_ATT:N-AD+                  |    
      |            |     +MOD_AT+                  |    
      |            |     |      |                  |    
 Expression of __NODE__ IA [__NODE__] in kidney occurs .
COMP:N-N(of) (expression,[__NODE__])
MOD_ATT:N-ADJ ([__NODE__],__NODE__)
MOD_ATT:N-N ([__NODE__],IA)
SUBJ:V-N (occur,expression)