CD247 and chronic myelogenous leukemia, BCR-ABL1 positive: Both TCRζ 3'-UTR isoforms were also identified in all CML-CR patient samples; however, 35% of the CML cases (14 cases) contained only the wild type TCRζ 3'-UTR (906 bp), and this was significantly different from the healthy individual and CML-CR groups (p < 0.001, p < 0.001).