Marginal effect of HAGBP (P6) on erythroid differentiation of K562 cells.

Cells were incubated with 5 μM of peptides indicated or Ara-C, a well-known inducer of erythroid differentiation in K562 cells, for 5 days with daily application of the peptides. Ara-C was added on days 1, 3, and 5. Hemoglobin-positive cells were detected by benzidine stain. Error bars indicate SEM (n = 6).