Heterogeneity of in vitro colony- and cl
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Dr. D. Metcalf; H. R. Macdonald
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Article
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1975
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John Wiley and Sons
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English
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## Abstract C~57~BL bone marrow cells were separated on the basis of their sedimentation velocity at unit gravity and cell fractions cultured in agar using three types of colony stimulating factor (CSF). Colonyβforming cells separated as a single peak (s = 4.4 mm/hr) in cultures stimulated by mouse