ABL1 endogenous control mRNA transcript when analyzed using the Xpert NPM1 Mutation assay on Cepheid GeneXpert Instrument Systems. The Xpert NPM1 Control Panel C194v1.1 consists of 5 components. Each component contains varying concentrations of NPM1 Type A, Type B or Type D mutant RNA transcript mixed with fixed concentrations of ABL1 and wildtype NPM1 transcripts to produce 5 levels of NPM1 Mutant RNA to ABL1 RNA; 0%, 1% NPM1 Type A, 1% NPM1 Type B, 1% NPM1 Type D, and 5% NPM1 Type A. The 0% level contains wildtype NPM1 and wildtype ABL1 transcripts only.