Chromosome aberration and mutation analysis
Date of blood sampling: May 16-19, 2000.
Whole blood was immediately mixed with cold stimulation medium and brought by plane to the RBC-Kyoto University, where lymphocyte cultures were established on May 26, 2000.
Blood was kept in the cool during travelling including transit stay in Moscow.

. Village ID Age Sex Aberrations Mutations**) No. of Dics + mN NO NN TCR (yrs) cells Rings type (10-4) (10-6) (10-4) Kurchatov K01 80 M 500 1 mN 39 14 1.7 K02 49 F 400 0 mm - - 0.7 K03*) 47 M 492 3 mm - - 1.1 K04*) 58 M 530 0 NN - - 1.5 K05 56 M 495 6 mm - - 1.3 K06 42 M 420 1 mN 62 10 2.9 K07*) 56 F 529 1 mm - - 1.4 K08*) 44 F 650 2 mN 20 6 0.8 K09 48 F 605 2 mm - - 1.1 K10 49 M 405 0 mm - - 2.3 Akzhar A01 59 F 660 1 mm - - 2.3 A02 58 F 362 0 mm - - 1.1 A03 34 M 642 1 NN - - 1.9 A04 48 F 403 0 mN 12 8 2.0 A05 58 F 506 0 mN 11 6 1.3 A06 55 M 650 1 mN 15 10 3.4 A07 59 F 500 0 NN - - 0.9 A08 49 M 300 0 mN 25 14 1.6 A09 36 M 326 0 mN 13 12 9.5 A10 40 M 631 1 mm - - 1.4 Sarzhal A01 60 M 490 4 mN 15 5 12.7 S02 50 M 360 0 mm - - ND S03 69 M 500 1 mm - - 1.4 S04 47 F 500 0 mN 6 10 ND S05 57 F 500 1 NN - - 0.8 S06 68 M 400 0 mm - - ND S07 39 F 382 0 mN 15 7 1.8 S08 50 F 500 0 mm - - 4.2 S09 43 F 510 1 mm - - 2.8 S10 55 F 508 0 mm - - 0.7 *) Worked in the nuclear test sites. **) GPA and TCR mutations were studued by S. Kyoizumi and T. Seyama (RERF). .

Semipalatinsk nuclear test site: Dates of nuclear test and flow of the associated cloud and presumed dose (Gy).

Distribution of persons with indicated frequencies of dic+ring aberrations. Control Japanese populations were not matched for age, sex and smoking habit. Among three outlyers in the exposed populations, two (0.616 dic+ring/100 cells and 1.212 dic+ring/100 cells) are residents in Kurchatov, another (0.816 dic+ring/100 cells) is a member of Sarzhal.