• 1 January 1980
    • journal article
    • research article
    • Vol. 40  (4) , 683-686
Abstract
Purified preparations of monoclonal rat Ig[immunoglobulin]G2a, IgG1, IgM and monomeric IgA, and of polyclonal IgG, were lightly radiolabeled with 125I and injected i.v. into rats. Blood samples were taken so that the half-life of each Ig isotype could be calculated. Half-life was defined as the time taken for the specific radioactivity present in the blood 24 h after injection to fall by half. The half-life values were 106 h for IgG2a, 53 h for IgG1, 63 h for polyclonal IgG, 25 h for IgM and 27 h for monomeric IgA.