BRP-39, Ym1 and Ym2 mRNA expression in mouse tissues. Quantification of BRP-39 (A), Ym1 (B) and Ym2 (C) mRNAs in mouse tissues. The expression levels of the CLPs were quantified by real-time PCR using the standard DNA containing the eight mouse genes (the mouse Refs/CLPs standard DNA with pGEM-T Easy). The y axis was expressed as molecules per 10 ng of total RNA. The upper panel indicates the actual value, and the lower panel shows each value on logarithmic scale. Data are presented as mean ± SD of three measurements.