Detection and quantification of gene expression by RT-PCR analysis of chondroitin sulfate proteoglycan-4 (Cspg4), also known as NG2 in human, and interferon-induced transmembrane protein-1, -2, and -3 (IFITM1, IFITM2, and IFITM3) (A). The gene products were detected for both AC and CT-2A cells. PCR was performed using β-actin primers as internal control and conditions as described in experimental methods. (B) The ratio of RT-PCR gene expression for each protein was compared to the β-actin internal control. The ratios of gene/β-actin are expressed as means (± 95% confidence interval) and three independent samples were analyzed for each cell line. The transcription level of each gene was compared between AC and CT-2A and statistical analysis was performed using two-tailed Student’s t-test (*p<0.01).