+-------------COMP:V-N(in)------------+    
      +----------------SUBJ:V-N----------------+         +-------MOD_ATT:N-ADJ-------+    
      +-------COMP:N-N(of)-------+             |         |     +-----MOD_ATT:N-N-----+    
      |           +-MOD_ATT:N-ADJ+             |         |     |     +--MOD_ATT:N-N--+    
      |           |       +MOD_AT+        +-NEG+         |     |     |       +MOD_ATT+    
      |           |       |      |        |    |         |     |     |       |       |    
 Expression of __SP__ __NODE__ mRNA does not occur in __SP__ bone marrow precursor cells .
COMP:N-N(of) (expression,mRNA)
MOD_ATT:N-ADJ (mRNA,__SP__)
MOD_ATT:N-ADJ (mRNA,__NODE__)
SUBJ:V-N (occur,expression)
NEG (occur,not)
COMP:V-N(in) (occur,cell)
MOD_ATT:N-ADJ (cell,__SP__)
MOD_ATT:N-N (cell,bone)
MOD_ATT:N-N (cell,marrowfat)
MOD_ATT:N-N (cell,precursor)