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Model structure of R. sphaeroides HemJ monomer. The HemJ model was predicted by automatic structure prediction server RaptorX (53). The His-16 proposed to bind heme is shown in blue. For prediction of heme-binding site, the server COFACTOR was used (55). PPM server (56) was used to predict position of the protein structure model within membrane. Both the N and C termini of the protein are on the periplasmic/lumenal side of the membrane.
