Cell cycle analysis suggested that SW1990-R, ASPC-R, MIA-R, PAN-R and P3-R had lower G_2/M and greater SF_2 (survival fraction after 2 Gy irradiation) compared with the parental cell lines.

• 耐放射株SW1990-R、ASPC-R、MIA-R、PAN-R及P3-R的G2/M均明显降低,而放射敏感性指标SF2升高9%25~45%25。