In cells preincubated for a day , levels of FOS mRNA reach a maximum 20 min after the addition of lectin and decline to control levels over the next 3 hr .
in cells preincubated for a day , levels of fos mrna reach a maximum 20 min after the addition of lectin and decline to control levels over the next 3 hr .
O O O O O O O O O B-RNA_molecule I-RNA_molecule O O O O O O O O O B-protein_family_or_group O O O O O O O O O O O