SDHB gene expression and c.136C>U RNA editing was quantified by RT–PCR16 (link). Unless noted otherwise, total RNA, genomic DNA and plasmid DNA were isolated using material and methods provided with TRIzol, DNA Wizard Genomic DNA Purification Kit (Promega) and Plasmid Kit (Qiagen, Germantown, MD), respectively. RNA/DNA was quantified by spectrophotometry on a Nanodrop 2000 instrument (Thermo Fisher). Proteins were quantified using Bio-Rad Dc assay with BSA standards. Statistical tests were two-tailed and were performed using R 3.0, Excel 2010 (Microsoft, Redmond, WA), or Prism 6.0 (GraphPad, San Diego, CA) software.
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