*4.10. Hypoxanthine-Guanine-Phosphoribosyl-Transferase (HPRT) Assay*

<sup>5</sup> <sup>×</sup> <sup>10</sup><sup>4</sup> CCL-93 cells were suspended in 200 <sup>µ</sup>L media and treated with 10 s CAP or carrier gas argon. The cells were propagated in medium containing 6-thioguanin (10 µg/mL). As control CAP and carrier gas treated cells were also propagated in medium without 6-thioguanin 24, 48 and 72 h after CAP exposure, the number of viable cells were measured with CASY cell counter and analyzer, as described under point 4.2.
