中国辽宁地区人群幽门螺杆菌感染菌株与相关性胃疾病的关系

图1 基因PCR产物琼脂糖凝胶电泳. A: cagA; 1: DNA分子质量标准; 2-14: cagA阳性; 15: 阴性; B: vacA s, vacA m1b, vacA m2; 1: DNA分子质量标准; 2, 5, 6, 7, 9, 10: s1 (259 bp)阳性; 3, 4, 8: s1阴性; 11: DNA分子质量标准; 13-19: m1b(291 bp)阳性; 12, 20: m1b(291 bp)阴性; 21: DNA分子质量标准; 23-27, 29, 30: m2(352 bp)阳性; 22, 28: m2阴性; C: iceA; 1, 8: DNA分子质量标准; 2, 3, 4, 5, 6: A1(247 bp); 9, 10, 11, 12, 13: A2(229或334 bp).