Labeling of BM CD34⁺ cells by BrdU after 52 and 69 weeks of BrdU ingestion by 2 baboons.

BM CD34⁺ cells were analyzed for BrdU labeling by means of anti-BrdU/PI staining and flow-cytometric detection. The open circles represent data obtained from baboon PA6588, and the closed squares represent data obtained from baboon PA6589.