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SDS-PAGE gels and heme staining of both purified recombinant cbb3 isoforms. (A) A total of 10 μg each of the isolated recombinant Cbb3-1 (lane 1) and Cbb3-2 (lane 2) were separated on a Tris-glycine 15% SDS-PAGE gel and stained with Coomassie brilliant blue. (B) Gel stained for TMPZ mediated heme peroxidase activity. The molecular masses (in kDa) of the prestained protein standards (lane M) are shown on the left. Subunits CcoN, CcoP, and CcoO are indicated.
