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. Author manuscript; available in PMC: 2010 May 1.
Published in final edited form as: Appl Immunohistochem Mol Morphol. 2009 May;17(3):239–246. doi: 10.1097/PAI.0b013e3181904379

Figure 6.

Figure 6

Relationship of the HER-2 staining intensity of a 3+ tissue biopsy section to the staining intensity of a 50 micromolar HER-2 peptide control spot on a glass microscope slide. The peptide spot intensities (x axis) are measured in units of mean pixel intensity (MPI). When error bars are shown, then the value represents the mean ± SD of more than one participating laboratory for that level of HER-2 peptide staining. The absence of an error bar means that only one laboratory returned a HER-2 peptide control value at that particular level of staining (expressed as “mean pixel intensity”, on the x axis). We fit the data with a best-fitting curve using a linear regression line.