il-2 and the mitogenic lectin , concanavalin a ( con a ) , as well as the calcium ionophore ionomycin , in concert with phorbol ester , ( pma ) enhanced c-myc gene transcription , but by distinct mechanisms as demonstrated by differential sensitivity to inhibition of protein synthesis and by transcriptional run-off assays using c-myc exon 1 and exon 2 probes .
C0031586
phorbol ester
C0039654
pma