Supplementary Figure 1: Pearson correlations between bismuth- and lanthanide-tagged antibodies.

a) Linear regression of marker intensity using ²⁰⁹Bi- and¹⁷⁰Er-tagged CD3 antibodies. Log10 mean value of seven marker intensities in Jurkat cells. Pearson correlation, r = 0.997; P < 0.00001, two-tailed t test. (b) Linear regression of marker intensity using ²⁰⁹Bi- and ¹⁷⁶Yb-tagged CD56 antibodies. Log2 mean value of 40 marker intensities in 15 cell subsets from human PBMCs normalized to minimal marker value in each cell subset. The data includes 600 combinations, 15 populations x 40 markers. Pearson correlation, r = 0.991; P < 0.00001, two-tailed t test.