ZAP70 and chronic myelogenous leukemia, BCR-ABL1 positive: Moreover, samples that contained only the wild type TCRζ 3'-UTR isoform demonstrated a high expression level for the ASF/SF-2, FcεRIγ, TCRζ and ZAP-70 genes, and based on this finding, we tried to characterized the different CML subgroups using the different expression patterns of the TCR signaling components.