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Characteristics
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Duodenum tumor tissue lysate was prepared by homogenization in lysis buffer (50 mM Tris-HCl pH7.4, 150 mM NaCl, 1 mM PMSF, 1 mM EDTA, 5 µg/mL aprotinin, 5 µg/mL leupeptin, 1 % Triton x-100, 1 % DOC, 0.1 % SDS). Tissue and cell debris was removed by centrifugation. The product was boiled for 5 min in 1 x SDS sample buffer (50 mM Tris-HCl pH 6.8, 12.5 % glycerol, 1 % sodium dodecylsulfate, 0.01 % bromophenol blue) containing 5 % beta-mercaptoethanol.
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