idenced by RT-PCR (Dataset S2), and Sam68−/− mice were devoid of Sam68 protein, as visualized by immunoblotting with anti-Sam68 AD1 and SC-333 antibodies or control normal rabbit serum or anti-Sam68 AD1 preabsorbed with peptide (Figure 2C). SC-333 is a rabbit anti-Sam68 antibody that was raised against the C-terminal 20 amino acids of Sam68 [47]. These data confirmed t