Fig. 1.

VGCC β subunit distribution in wild type and β subunit null mouse retina. A) β₁ is present on cell membranes in the middle portions of the INL and processes extending into the ONL and IPL; lateral processes can be detected; B) no β₁ is found in CNS β₁ null retinas; C) β₂ is expressed as punctate label in the OPL with weak but punctate label throughout the IPL; D) no β₂ is present in CNS β₂ null retinas; E) β₃ is seen in two distinct narrow bands in the IPL, scattered cells throughout the most proximal row of the INL, and some cells in the GCL; The strongest immunoreactivity is observed in the outermost band of the IPL; F) no β₃ is noted in β₃ null retinas; G) β₄ is distributed in 4 bands in the IPL H) no β₄ is detected in β₄ null retinas. Scale bar = 25 µm.