Cultured primary Müller cells from 8-day-old LRP5−/− retinas are positively stained for LacZ.

<p>Cells were cultured in coverslip for 5 days, fixed with 0.5% glutaraldehyde, and stainied for LacZ. Cytosolic LacZ signals are observed in Muller cell bodies. Scale bar, 20 µm.</p>