Increased PEAR1 expression during megakaryopoiesis parallels DNA methylation enrichment at CGI1. (A) Schematic representation of PEAR1 regions investigated in the methylation study indicated as black vertical boxes (“PCGI1” in CpG-island 1 [CGI1], “Pintron1” in intron 1 of PEAR1, “rs12041331”, “PCGI2” in CpG-island 2 [CGI2]). (B) Sequenom methylation estimates (% average) for PCGI1, Pintron1, and PCGI2 (bar representation, average ± standard deviation, n = 8). (C) Single CpG (dot line representation) during differentiation of CD34+ cells into MK precursors harvested at day 0 (D0), day 7 (D7), and day 14 (D14), and (D) of GG (n = 5) vs AG+AA (n = 3) methylation at day 14. *P < .05 one-way ANOVA.