Table I.

Primers utilized for reverse transcription-quantitative PCR amplification.

Gene	Upstream primer sequence (5′-3′)	Downstream primer sequence (5′-3′)
MCM2	ATCTACGCCAAGGAGAGGGT	GTAATGGGGATGCTGCCTGT
MCM3	TGGCCTCCATTGATGCTACC	GGACGACTTTGGGACGAACT
MCM5	TCATCTCCAAGAGCATCGCC	CCTCGGCGAGTAAGTCCATC
CHK1	AATGCTCGCTGGAGAATTGC	CACCACCTGAAGTGACTCGG
DHX9	GCCAATTTCTGGCCAAAGCA	CGAGGCTCAATGGGGAGTTT
β-actin	CAGGCACCAGGGCGTGAT	TAGCAACGTACATGGCTGGG

MCM, minichromosome maintenance complex component; CHK1, checkpoint kinase 1; DHX9, DEAH (Asp-Glu-Ala-His) box helicase 9.