Figure 1: Cell surface marker expression patterns in sheep cardiovascular cell clones. Sheep cardiovascular progenitor cell clones were examined for expression of early cardiovascular progenitor cell markers CD105, SSEA- 4 and c-kit using flow cytometry. Cell surface marker expression on three representative cardiovascular progenitor cell clones is shown here. The CD105+SSEA4+c-kit+ cell clone shown is FC1, the CD105+SSEA4-c-kitclone is FC2 and the CD105+SSEA4-c-kit+ clone is HB1. A total of 36 clones were examined by flow cytometry. Positively labeled cells are represented in black, isotype controls are shown as a clear tracing.