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![Heme Assay Kit (Colorimetric) [KA1617] - The standard curve is for the purpose of illustration only and should not be used to calculate unknowns. A standard curve should be generated each time the assay is performed.](http://images.novusbio.com/fullsize/Heme-Assay-Kit-Colorimetric-KA1617-img0001.jpg "Heme Assay Kit (Colorimetric) [KA1617] - The standard curve is for the purpose of illustration only and should not be used to calculate unknowns. A standard curve should be generated each time the assay is performed.")