Figure 2.

Flow cytometry analyses of cell-surface marker expression in ALDH^hi and ALDH^lo atrial cells. (A) Freshly isolated cells. Aldefluor-reacted cells were stained with antibodies to the indicated markers (see Supplementary Table 1). CD31⁺, CD105⁺, CD34⁺, and CD106⁺ cells (%) are significantly increased in ALDH^hi cells relative to ALDH^lo cells (fold-increases are indicated); *p < 0.05. (B) Outgrowth cells. ALDH^hi cells lack CD34 expression and exhibit a marker profile similar to that of ALDH^lo cells (n ≥ 5 per marker and group).