ZAP70 and chronic myelogenous leukemia, BCR-ABL1 positive: Based on our previous finding that the TCRζ chain gene expression level was significantly decreased in CML, we further investigated the expression pattern of the TCRζ regulating factors TCRζ 3'-UTR and ASF/SF-2, as well as the expression level and correlation of FcεRIγ and ZAP-70, to evaluate the ASF/SF-2 regulating effects of TCRζ 3'-UTR formation.