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Anode Biofilm Transcriptomics Reveals Outer Surface Components Essential for High Density Current Production in Geobacter sulfurreducens Fuel Cells

Figure 3

OmcZ sequence and identification.

A. Amino acid sequence of OmcZ. The predicted cleavage site for mature OmcZ indicated by arrow. Confirmed heme-binding domains (CXXCH) are enclosed in boxes. OmcZ has 473 amino acid residues and 7 heme binding domains. B. Cytochrome content of loosely bound outer membrane protein-enriched fractions from fumarate and current-harvesting biofilms. Proteins (10 µg/lane) were separated by 12% Tris-Tricine denaturing polyacryamide gel electrophoresis and stained for heme. C. Peptides detected from two different sizes of OmcZs, fragments detected in the 50 KDa OmcZ are indicated in panel A in red; fragments detected in the 30 KDa OmcZ are indicated in panel A in green and fragments detected in both size OmcZ are indicated in blue.

Figure 3

doi: https://doi.org/10.1371/journal.pone.0005628.g003