+----------SUBJ:V-N----------+---------COMP:V-N(in)--------+       
      +----COMP:N-N(of)----+       |        +-----MOD_ATT:N-N----+       
      |            +MOD_ATT+       |        |     +--MOD_ATT:N-N-+       
      |            |       |       |        |     |              |       
 Expression of __NODE__ protein occurs in cell surface from macrophages .
COMP:N-N(of) (expression,protein)
MOD_ATT:N-ADJ (protein,__NODE__)
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,macrophage)
MOD_ATT:N-N (macrophage,cell)
MOD_ATT:N-N (macrophage,surface)