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Fig. 4. Analysis of growth rates and urinary protein levels. (A)
Growth curves (weight versus age) of control mice,
Lamb2-/- mice and Lamb2-/- mice
carrying transgenes. Lamb2-/- and
Lamb2-/-; NEPH-B2 mice fail to surpass a weight of
4
g and die at 3-4 weeks of age. By contrast, Lamb2-/-;
MCK-B2 mice grow at a rate similar to controls but die at 1 month of age.
Lamb2-/-; MCK-B2; NEPH-B2 doubly transgenic mice exhibit
normal weight gain and a long life. (B) Proteinuria in
Lamb2-/-; MCK-B2 mice. Urine (1 µl) was analyzed by
SDS-PAGE and stained with Coomassie Blue. M, markers; the pink band is
albumin. Lanes 1, 5 and 6: urine from Lamb2+/-; MCK-B2 mice. Lanes 2,
4 and 7: urine from Lamb2-/-; MCK-B2 mice. Lane 3 was
empty.