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Low-power views of representative sections from biopsy specimens of human stomach, duodenum, and colon incubated with the HC domain from TeNT as a negative control, with native SLPs extracted from strain 630 (SLP-630), or with purified recombinant SlpA precursor (pNZ-1e4H). Positive binding is indicated by the brown color following immune detection with anti-SLP antiserum and HRP-coupled anti-Ig.
