肿瘤病毒的分离和纯化,是研究肿瘤和白血病病毒病因及探讨细胞癌变机理的必要条件。动物RNA致癌病毒的分离可采用蔗糖密度梯度和氯化铯密度梯度离心法。巫爱珍等应用分子筛凝胶层析法分离家蚕细胞质多角体RNA病毒。以上这些方法都分离到具有生物活性的病毒颗粒。小鼠L6565瘤株是我国六十年代建立的第一株小鼠病毒性淋巴细胞型白血病。用带瘤小鼠的胸腺、脾脏和淋巴结的无细胞滤液接种昆明 The isolation and purification of tumor virus is a necessary condition for studying the etiology of tumor and leukemia virus and exploring the mechanism of cell canceration. Isolation of animal RNA oncogenic viruses can be performed using sucrose density gradient and cesium chloride density gradient centrifugation. Wu Aizhen and other applications of molecular sieve gel chromatography silkworm cytoplasmic polyhedrosis RNA virus. These methods are isolated biologically active virus particles. Mouse L6565 tumor strain is the first mouse virus-type lymphocytic leukemia established in China in the 1960s. Kunming was inoculated with cell-free filtrate of thymus, spleen and lymph nodes of tumor-bearing mice