+MOD_ATT+SUBJ:V_PASS+COMP:V_PASS-+COMP:N-N(o+                       
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 __NODE__ protein is involved in regulation of cells from immune system .
MOD_ATT:N-ADJ (protein,__NODE__)
SUBJ:V_PASS-N (involve,protein)
COMP:V_PASS-N(in) (involve,regulation)
COMP:N-N(of) (regulation,cell)