Five diets, containing equal amounts (23 %) of crude protein, and different energy concentrations, ranging from 11,5 to 17,0 MJ ME/kg DM, were fed ad lib to 52 Landrace X LargeWhite barrows. Dietary energy content was manipulated by replacing maize starch by equal increments of pine wood sawdust. Pigs were slaughtered sequentially at two-weekly intervals from an age of 11 weeks up to 3l weeks, ground and analysed for body protein. Using the Roux mathematical model, daily protein depositions of the pigs on the 5 treatments were calculated over the growth period (25 – 100 kg live mass). The rate of protein deposition was influenced by dietary energy concentration, the pigs on the highest energy treatment attaining the highest rate of protein deposition (94 g/day). Daily protein deposition for all the treatments, peaked at 45 kg live mass, and declined subsequently