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目前临床上应用的转移因子主要来源于人牌、猪牌或牛脾细胞。为了解不同来源的转移因子是否具有相同的免疫学作用，作者对三种转移因子的理化特性和免疫学活性进行了比较。1．测定三种转移因子在不同波长紫外吸收光谱的OD值，结果牛转移因子E260／E280的比值为1，而入和猪转移?
At present, the transfer factor mainly used in clinical application of human, pig or spleen cells. To understand whether transfer factors from different sources have the same immunological effect, the authors compared physicochemical properties and immunological activities of the three transfer factors. 1. The OD values of the three transfer factors at different wavelengths were measured. The results showed that the ratio of bovine transfer factor E260 / E280 was 1, while the transfer into pigs and pigs.