HOX A5 antisense ODN inhibit GM-CSF–stimulated colony formation. (A) Human bone marrow cells plated into colony assays containing 1 nmol/L human recombinant GM-CSF and increasing concentrations of ODN. (B) A separate experiment similar to (A) at a single dose of 20 μmol/L ODN. Data from both experiments are reported relative to the number of colonies formed in assays containing no ODN and are calculated from the mean of three assay wells.