ABL1 and chronic myelogenous leukemia, BCR-ABL1 positive: The RNA quality was indicated by the sum of copy number (SCN) of the control gene, ABL1. 60% of the samples exhibited good quality, with SCNABL1 of 100,000 or more, meeting the criteria for evaluating a 5-log reduction in molecular response (MR5) or deeper when assessing CML patients on treatment.