Punctate clusters of BK β1 subunits are located in the cell body and
peripheral processes of magnocellular neurons. Magnification, 20×, of a
section from fixed adult rat brain immunolabeled with: A,
anti-β4-conjugated followed by mouse secondary Alexa 488-conjugated
antibody; or B, anti-β1- and Alexa 488-conjugated antibody. C,
magnification, 63×, of two neurons labeled with anti-β1- and Alexa
488-conjugated antibody. The sections in A to C are counterstained with
anti-AVP neurophysin- and Alexa 594-conjugated antibody. Arrowheads, stained
dendrites.