Table 1
Information of evaluated internal control genes and their primer sequences

Reference gene	Accession number	function	Forward primer	Reverse primer	Amplicon size (bp)
Glyceraldehyde-3- phosphate dehydrogenase (GAPDH)	NM_001163856	Oxidoreductase in glycolysis and gluconeogenesis	TGTCATCAACGGAAAGGC	GCATCAGCAGAAGGAGCA	183
β-actin	NM_001081838	Cytoskeletal structural protein	GGGCATCCTGACCCTCAAG	TCCATGTCGTCCCAGTTGGT	63
Β2-microglobulin (B2M)	NM_001082502	A component of MHC class I molecule	CGAAGGTTCAGGTTTACTCACG	ATTTCAATCTCAGGCGGA	97