Figure 7.

CIN I Lesion Hybridized with Biotin-Labeled pUC18. A. A CIN I lesion (Figure 6.) hybridized with biotin-labeled pUC18 resulting in a background-free section. AEC was applied for 10 minutes. B. A CIN I lesion (Figure 6.) hybridized with biotin-labeled pUC18 resulting in punctate-like signals around cells and in the cytoplasm. DAB was applied for 3 minutes. This non-specific staining demonstrates that care is required when interpreting DAB signals, and illustrates the necessity to perform proper control assays when using tyramide reagents. Scale Bar: 20μm

Evans et al. BMC Clinical Pathology 2003 3:2   doi:10.1186/1472-6890-3-2
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