目的观察空间诱变小鼠黑色素瘤b 16细胞株的成瘤性，寻找免疫原性发生变异的细胞株。
Objective To explore the oncogenesis of the melanoma B16 cell clones mutagenized by space environment, and find the B16 cell clones with remarkably mutated immunogenicity.
结合菌株传代稳定性试验，说明该菌株已发生了遗传性变异，是经太空诱变后所选育的泰乐菌素高产菌株。
By the experiment of genetics stability, it showed that genetic variation of the strain had already taken place. It was the highest strain of the tylosin of selective breeding after space mutagenesis.
通过对其诱变机理的研究表明：太空的强辐射是生物发生诱变的主要原因；微重力是重要的辅助条件。
The study on the mechanism of mutation of living things in space showed that strong radiation in space was the main reasons, and the micro-gravity was another important condition for the mutation.
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