PTPRC and atrial fibrillation: Plotting viable cells for violet-induced autofluorescence (AF) and expression of CD45 allowed to distinguish three populations: AF+ cells (mean ± SD of 32.5 ± 5.5%), CD45+ cells (mean ± SD of 8.8 ± 4.2%), and CD45-/AF- cells (mean ± SD of 53.8 ± 7.2%) (Figure 3B).