IL-13 competes for the binding of
I-IL-4 on AIDS-KS cells
Data presented for KS248 and NCB-59 are the actual 125I-IL-4 bound to 106 cells in the presence of varying concentrations of either unlabeled IL-4 or IL-13. KS248 and NCB-59 cells incorporated 9296 ± 236 (cpm ± S.D.) and 11,009 ± 366 (cpm ± S.D.), respectively, in the absence of competitor. The error bars represent the standard deviation of duplicate determinations.