Western blot analysis of K_V1.4 and K_V3.4 expression. (A and B) Immunoblots tested with the specific antibodies anti-K_V1.4 (A) and anti-K_V3.4 (B). See Materials and methods and Results for details. The results with the 75–010 antibody were obtained from two different blots, as indicated by the vertical line. The results with the APC-007 antibody were obtained from a single blot, but a lane between MM and ML was removed, as indicated by the vertical line.