Transfection of EL-4 cells with the IL-4 promoter-reporter constructs carrying mutated P -like elements showed that four P-like elements , CLE0 , P , P2 and P4 , but not P3 , were required for optimal activation of the IL-4 promoter .
transfection of el-4 cells with the il-4 promoter-reporter constructs carrying mutated p -like elements showed that four p-like elements , cle0 , p , p2 and p4 , but not p3 , were required for optimal activation of the il-4 promoter .
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