+SUBJ:V-N+--OBJ:V-N-+                        
     |        |          |                        
 __NODE__ increases regulation of cation channel .
SUBJ:V-N (increase,__NODE__)
OBJ:V-N (increase,regulation)

     +------OBJ:V-N------+                        
     |        +MOD_ATT:N-+                        
     |        |          |                        
 __NODE__ increases regulation of cation channel .
OBJ:V-N (__NODE__,regulation)
MOD_ATT:N-N (regulation,increase)