Experimental design.

<p>Ca, calcium; LP, rats with intact renal function fed a low phosphorus diet; LP-Rap, rats with intact renal function fed a low phosphorus diet and treated with rapamycin; NP, rats with intact renal function fed a normal phosphorus diet; NP-Rap, rats with intact renal function fed a normal phosphorus diet and treated with rapamycin; NxLP, nephrectomized rats fed a low phosphorus diet; NxLP-Rap, nephrectomized rats fed a low phosphorus diet and treated with rapamycin, NxNP, nephrectomized rats fed a normal phosphorus diet; NxNP-Rap, nephrectomized rats fed a normal phosphorus diet and treated with rapamycin; P, phosphorus.</p> <p>(TIF)</p>