+--------COMP:N-N(of)-------+     
          +----SUBJ:V-N----+        |           +-MOD_ATT:N-ADJ-+     
   +MOD_AT+          +-NEG-+-OBJ:V-N+           |       +MOD_ATT+     
   |      |          |     |        |           |       |       |     
 Beta __NODE__ does not affect expression of __SP__ __NODE__ protein .
MOD_ATT:N-N (__NODE__,Beta)
SUBJ:V-N (affect,__NODE__)
NEG (affect,not)
OBJ:V-N (affect,expression)
COMP:N-N(of) (expression,protein)
MOD_ATT:N-ADJ (protein,__SP__)
MOD_ATT:N-ADJ (protein,__NODE__)