KCC2 and CaMKIIα expression at the membrane borders between mature terminally differentiated fiber cells in the interior of
the young adult rabbit lens. In the left panel, anti-KCC2 detects cross-reacting protein at fiber borders of mature fiber
cells (corresponds to the asterisk in Figure 3
) and similar to calcium calmodulin dependent kinase IIα (CaMKIIα) detection in the adjacent field of view in the right panel,
consistent with findings from previous studies (24; rabbit fiber cells are about 10 μm across in their longest dimension).