B inhibited cells, an obvious increase inX-ray-induced mutations was observed after treatment with ELFMF incombination with X-irradiation in M054 cells with tyrosine mutant 1KB-agene other than with serine mutant 1KB-a gene or vector alone.

• 基因的 M054细胞X线诱导的HPRT基因突变，而对导入了丝氨酸突变体I。 B－a基因或空载体的M054细胞没有影响。