Abstract
Immunomagnetic separation has been used to enrich CD34-positive cells in umbilical cord blood. Cell purities were increased from 0.59% preseparation to 92.7% postseparation (n = 16) with a mean yield of 75.7%. CFU were enriched 127 fold by immunomagnetic separation. Addition of combinations of recombinant growth factors resulted in cloning efficiencies of greater than 50%.
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