Ubiquitous expression of Gab1 and Gab2. Total RNA was isolated from mouse tissues. RNA (20 μg) was analyzed by Northern blotting with mouse Gab1 (upper panel) and Gab2 cDNAs (lower panel) as probes. Note that RNA for both Gab1 and Gab2 was detected in all of the tissues after a long exposure. CHO-B cDNA was used as a loading control.