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+----------COMP:V-N(in)----------+ +-------------SUBJ:V-N------------+ +--MOD_ATT:N-ADJ--+ +----COMP:N-N(of)---+ | | +MOD_ATT+ | +MOD_AT+ +-NEG+ | | +MOD+ | | | | | | | | | Expression of __NODE__ mRNA does not occur in undifferentiated 3T3 L1 cells . COMP:N-N(of) (expression,mRNA) 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,undifferentiated) MOD_ATT:N-ADJ (cell,3T3) MOD_ATT:N-N (cell,L1)