Table 1.

Excretion of injected [32P]DNA into urine.1

RadioactivityAmount of DNA excreted into urine
1st day2nd day3rd dayTotal
Total
cpm1 080 800100 80077001 189 300
% of injected DNA2.90.30.023.2
Acid-insoluble
cpm21 000ND2ND21 000
% of injected DNA0.060.06
  • 1 Each mouse received an injection containing 37 × 106 cpm of nick-translated λ-phage 32P-labeled DNA. Urine from each animal (n = 3) was collected daily to measure total and acid-insoluble radioactivity.

  • 2 ND, not detected.