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Recombinant expression and characterization of C. maenas hemoglobin. A, CmaHbΔN1–20 was recombinantly expressed in E. coli and purified using a three-step protocol consisting of ammonium sulfate precipitation followed by ion exchange and size exclusion chromatography. B, absorbance spectra of hexacoordinate CmaHb. Deoxygenated ferrous form (dotted line), CO form (solid line), and in the presence of oxygen (dashed line).
