NKT-cell depletion of CBMNCs reduces CFU activity. (A) CBMNCs (i) were depleted of NKT cells (ii) or not depleted (iii) by flow sorting. (B) The short-term clonogenic capacity of NKT-cell–replete and –depleted CBMNCs were compared in CFU assays performed in the presence of cytokines. Values are the mean and SEM of 6 independent experiments (*P < .05 by paired Student t test).