+----------SUBJ:V-N----------+                   
      +----COMP:N-N(of)----+       |                   
      |            +MOD_ATT+       +COMP:V-N(in+       
      |            |       |       |           |       
 Expression of __NODE__ protein occurs in lymphocytes .
COMP:N-N(of) (expression,protein)
MOD_ATT:N-ADJ (protein,__NODE__)
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,lymphocyte)