FIG 5.

Mrp antibody levels in sera from children ages 2 to 16. Serum samples were collected randomly from the clinical laboratories of a pediatric hospital in Memphis, TN. All sera were diluted 1:200 and assayed in duplicate by ELISA against Mrp2N, Mrp4N, and Mrp49N. The average OD values from each serum sample against all three Mrps were added and plotted against the age of the subject. Pearson's correlation coefficient was used to determine the significance of the relationship between the age of the subject and the OD value: r = 0.24, P < 0.001, n = 281.