目的测定肿瘤细胞及耐药性细胞中双微体(double minutes,DMs)的大小。方法应用PFGE(Pulsed field gradient gel electrophoresis)与Southern印迹杂交技术,对人卵巢癌细胞UACC-1598及氨甲蝶呤(Methotrexate,MTX)抗性的小鼠胚胎成纤维细胞...
This work was supported by Teaching and Research Award Program for Outstanding Young Teachers in Higher Education Institu-tions by Ministry of Education of China, the National Natural Science Foundation (No. 30370783), and the Key Project of Science and Technology by Heilongjiang Province (No. GB03C601-1).