Tuftsin.
D006801:Humans; D007553:Isotope Labeling / Q000379:methods; D011863:Radioimmunoassay / Q000379:methods; D014316:Tritium; D014405:Tuftsin / Q000097:blood* / Q000138:chemical synthesis / Q000502:physiology
D014316:Tritium; D014405:Tuftsin