Characterization of erythroid differentiation during in vitro culture. Flow cytometric analysis of cultured CD34⁺ cells labeled with CD235, CD44, and CD41 antibodies. (A) Control donor and a patient with an RPL5 mutation at day 8 and day 13 of terminal erythroid differentiation. (B) Control donor and a patient with a RPS17 mutation at day 14 of culture. (C) Control donor and a patient with a RPS24 mutation at day 14 of culture.