Table 1.

Candidate reference genes used in this study.

Abbreviation	Reference gene name	Gene function	Accession number
GAPDH	Glyceraldehyde-3-phosphate-dehydrogenase	Glycolysis enzyme	DQ848904
18S	18S ribosomal RNA	Ribosomal subunits	EF126038
ACTB	Beta actin	Cytoskeletal structural protein	AY008305
EF1A	Elongation factor 1-alpha	Translational elongation	AF467776
CTSD	Cathepsin D	Endoproteolytic aspartic proteinase	EU077233
B2M	Beta-2-microglobulin-like	Cytoskeletal protein	DQ848854