Abstract
Culture of a mixture of bone marrow cells with and without T6 chromosome marker in diffusion chambers in mice yielded colonies (CFU- DG) containing cells of a single karyotype, suggesting clonality. Injection of individual CFU-DG colonies into lethally irradiated mice resulted in increased spleen colony formation on day 12 (CFU-S). The possibility of endogenous origin was excluded by demonstrating the presence of T6 marker in both CFU-DG and CFU-S colonies in karyotypically normal hosts. These findings suggest that the cells giving rise to granulocytic colonies in diffusion chambers also can give rise to multipotential hemopoietic cells.
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