Correlation between secretion of genotype 4 HDV and different HBsAg expression provided by HBV-producing plasmids of various genotypes. (A) Analysis of HDV RNA and HDAgs in cellular lysates. (B) Analysis of HDV RNA, HDAgs, HBsAgs, and HBV DNA in culture media. Analyses of intracellular and extracellular HDV RNA, HDAgs, HBsAgs and HBV DNA were performed as described in the legend of Fig. 2.