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Albuminuria after instillation of ricin. Animals were treated with saline or 20 μg of ricin/100 g body weight. Urine samples were collected throughout 48 hours in metabolic cages. Equal amounts of urine from three saline- or ricin-instilled mice were concentrated and examined by SDS-PAGE as indicated (lanes 1 to 6). Varying concentrations of bovine serum albumin, as indicated, were loaded onto the gel to serve as indicators.
