Analysis of DCK expression. (A) Distribution of DCK mRNA expression measured on the Affymetrix GeneChip Human Exon 1.0 ST array in the CEU and YRI cell lines (P = .02). (B) Association between level of DCK protein expression and log₂ AUC in a subset of YRI cell lines (r² = 0.69, P = .04). (C) Association between DCK SNP genotype and log₂ AUC (P = .02), DCK expression levels (P = .003), and intracellular ara-CTP (P = .003).