+--------COMP:N-N(of)-------+     
           +--COMP:V_PASS-N(In)--+            |           +-MOD_ATT:N-ADJ-+     
       +MOD+         +SUBJ:V_PASS+COMP:V_PASS-+           |       +MOD_ATT+     
       |   |         |           |            |           |       |       |     
 In HK 2 cells , __NODE__ is involved in expression of __SP__ __NODE__ protein .
MOD_ATT:N-N (cell,2)
COMP:V_PASS-N(In) (involve,cell)
SUBJ:V_PASS-N (involve,__NODE__)
COMP:V_PASS-N(in) (involve,expression)
COMP:N-N(of) (expression,protein)
MOD_ATT:N-ADJ (protein,__SP__)
MOD_ATT:N-ADJ (protein,__NODE__)