Characteristics of exon microarray and tag-seq data. (A) Venn diagram illustrating numbers of differentially expressed genes identified by exon microarray and tag-seq. An overlap of 30 differentially expressed genes between the pure OCI-Ly8 and HEK293 cell line samples was identified between exon microarray and tag-seq. (B) Proportion of B-cell specific mRNA transcripts detected above background for exon microarray. Hierarchical clustering of all cell populations based on differentially expressed genes between the pure samples of OCI-Ly8 and HEK293 cell lines identified by (C) exon microarray and (D) tag-seq.