The far left column (Sample) provides the designator for each sample (P1–P6). The second column (V_H gene) lists the germline Ig V_H genes that have the highest homology with the Ig V_H genes isolated from each sample. The percent homology column lists the percent sequence homology between the isolated V_H gene and the deduced germline V_H gene having the highest base sequence homology. The Anticipated Phenotype column provides the expected reactivity of the surface Ig with the anti-CRI or anti-V_H subgroup reagents. The columns labeled SpA, B6, Lc1, or μ provide the observed MFIR of the leukemia cell population stained with each of these reagents relative to that of the cells stained with an isotype control mAb. N.T., sample was not tested.