tokens: Accumulation of C/EBP epsilon mRNA occurred as early as 1 hour after exposure of NB4 cells to 9-cis RA ( 5 x 10 ( -7 ) mol/L ) ; and at 48 hours , levels were increased by 5 . 1-fold .
folded_tokens: accumulation of c/ebp epsilon mrna occurred as early as 1 hour after exposure of nb4 cells to 9-cis ra ( 5 x 10 ( -7 ) mol/l ) ; and at 48 hours , levels were increased by 5 . 1-fold .
labels: O O B-RNA_molecule I-RNA_molecule I-RNA_molecule O O O O O O O O O B-cell_line I-cell_line O B-other_organic_compound I-other_organic_compound O O O O O O O O O O O O O O O O O O O O O O O