Research Article
Occult Hepatitis B Infection among Hemodialysis Patients in Tabriz, Northwest of Iran: Prevalence and Mutations within the S Region
Figure 1
(a) Agarose gel electrophoresis of the nested PCR for OBI. C+: positive control; L: 100 bp DNA ladder; C−: negative control; S: OBI-positive samples (227 bp). (b) Agarose gel electrophoresis of the second round of nested PCR for HBsAg amplicon with a length of 700 bp. C+: positive control; L: 100 bp DNA ladder; C−: negative control; S: amplified fragment for sequencing (700 bp).
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