passages.id: split_4_test_701_passage
passages.type: progene_text
passages.text: A rapid induction of C / EBPdelta mRNA within 30 min was followed by slower emergence of PDGFalphaR mRNA , which reached the maximum level in 12 h , whereas C / EBPdelta mRNA was detectable at 30 min and reached the maximum level at 3 h .