Expression of the IL-7R (CD127) on neonatal and adult lymphocytes. PBMCs were separated from 6 cord blood samples and 8 peripheral blood samples of young adults. Expression of the IL-7 receptor α-chain (CD127) was determined by 2-color flow cytometry of CD4⁺ (A, B) and CD8⁺ T cells (C, D). Data are presented as box plots of frequencies (A, C) or mean fluorescence intensities (B, D) with medians, 25th and 75th percentiles are presented as boxes, and 10th and 90th percentile are presented as whiskers.