+--------------------------------COMP:V-N(In)--------------------------------+                                           
      |                           +--------------------SUBJ:V-N--------------------+                                           
      |                           +------------------OBJ:V-N-----------------+     +----------------OBJ:V-N----------------+   
      +COMP:N-N(fr+        +MOD_AT+       +-------------SUBJ:V-N-------------+     +COMP:V-N(in)+COMP:N-N(of+       +MOD_AT+   
      |           |        |      |       |                                  |     |            |           |       |      |   
 In liver from __SP__ , mutant __SP__ __NODE__ gene ( homozygous knockout ) is involved in expression of __SP__ __NODE__ mRNA .
COMP:N-N(from) (liver,__SP__)
MOD_ATT:N-ADJ (__SP__,mutant)
OBJ:V-N (be,__SP__)
SUBJ:V-N (be,__NODE__)
COMP:V-N(In) (involve,liver)
SUBJ:V-N (involve,__SP__)
COMP:V-N(in) (involve,expression)
OBJ:V-N (involve,mRNA)
COMP:N-N(of) (expression,__SP__)
MOD_ATT:N-ADJ (mRNA,__NODE__)