Fig. 6.

(A) Body ²H₂O enrichments in human subjects (n = 21) maintained on 50–70 ml of ²H₂O intake per day for up to 10 weeks. (B) Correlation between blood monocyte and granulocyte dR enrichments in humans (n = 9) after 5–10 weeks of ²H₂O intake. Blood cells were isolated as described in the text; DNA was isolated and hydrolyzed, and the enrichment of dR in dA was measured. (C) Ratio of dR:body ²H₂O enrichments from monocytes and granulocytes of human subjects (n = 9) after 5–10 weeks of ²H₂O intake. The PTA derivative of dA was analyzed. Data are means ± SD.