TKTL2 and B-cell chronic lymphocytic leukemia: To determine their specificity, six of the CC biomarkers identified in Figure 3: CTAG1A, LYZL6, SCP2D1, TEX33, TKTL2, and SPZ1 were screened for expression in five samples of chronic myeloid leukemia (CML), three samples of chronic lymphoblastic leukemia (CLL), and eight samples of BC isolated from the Saudi population.