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| Proteins, Expression, Isolation and Analysis | The supernatant was loaded on a Nickel column (Genscript, Nanjing, China), washed with running buffer containing 50 mM Tris-HCl, 300 mM NaCl and 5% glycerol (pH 8.... Lane M, Smar t Broad-Range protein standard (Genscript, Nanjing, China); lane 1, the supernatant of un-induced cells; lane 2, the precipitant of un-induced cells; lane 3, the supernatant of the cells induced at 15?C; lane 4, the precipitant of the cells induced at 15?C; lane 5, the supernatant of the cells induced at 25?C; lane 6, the precipitant of the cells induced at 25?C; lane 7, the supernatant of the cells induced at 37?C; lane 8, the precipitant of the cells induced at 37?C. | Get A Quote |
Per?a?9 is a major allergen of the American cockroach?(CR), which has been recognized as an important cause of imunoglobulin?E-mediated type?I hypersensitivity worldwide. However, it is not neasy to obtain a substantial quantity of this allergen for use in functional studies. In the present study, the Per?a?9 gene was cloned and expressed in Escherichia coli?(E.?coli) systems. It was found that 13/16?(81.3%) of the sera from patients with allergies caused by the American CR reacted to Per?a?9, as assessed by enzyme-linked immunosorbent assay, confirming that Per?a?9 is a major allergen of CR. The induction of the expression of CD63 and CCR3 in passively sensitized basophils?(from sera of patients... More
