Multiple Choice Northern Blot filters containing 12 different mouse tissues were purchased from Origene. The filters were probed for each Acdp gene with a PCR fragment (around 350 bp) from last exon and the 3' untranslated region labeled with α-32P dCTP using the random primer extension system (Life Technologies). Hybridizations were carried out overnight. The filters were washed twice with washing buffer I (2×SSC, 0.1% SDS) at 42°C for 15-min, and then washed twice with washing buffer II (0.25×SSC, 0.1% SDS) at 65°C for 15-min. Washed filters were exposed to X-ray films for overnight or longer [3,4].