An anti-BAI1 rabbit polyclonal was generated (Covance, Princeton, NJ) against amino acids 1180–1584 of human BAI1 and affinity purified using the antigen purified as a thrombin-cleaved GST-fusion coupled to UltraLink BioSupport (Thermo Scientific, Waltham, MA). We described this antibody previously (Duman et al., 2013 (link)); BAI1 is only detected by this antibody in Western blots of Cos-7 cells when they are exogenously expressing BAI1. The immunoreactivity of this antibody for neurons is strongly decreased by BAI1 Kd. This antibody was used at 0.001 mg/ml for IHC, ICC, and Western blotting and was reused at least 5X. For immunoprecipitation, 1 µg per 1.3 × 106 neurons in culture was used. Rabbit anti-BAI11 N-terminal polyclonal (H-270, sc-66815), rabbit anti-Bcr polyclonal (N-20, sc-885), mouse anti-Abr monoclonal IgG1 (24, sc-135821), and mouse monoclonal anti-c-myc IgG1 (9E10, sc-40) were obtained from Santa Cruz Biotechnology (Dallas, TX) and used at 1:1000 dilution for Westerns and ICC. DMSO (D2650) was obtained from Sigma (St. Louis, MO). Tetradotoxin, narciclasine, D-AP5, and Y-27632 dihydrochloride were obtained from Tocris (Minneapolis, MN). Potassium chloride (P217) was obtained from Fisher Scientific (Pittsburgh, PA).
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