The Protein Minima for Nitrogen Equilibrium with Different Proteins

Abstract
Lactalbumin, serum protein, casein and gliadin have been evaluated with respect to the minimal amount of each in the diet essential for the dog in attaining nitrogen equilibrium. Expressed as percentage of total ingested calories furnished by the protein, these values have been found to be 6.9, 8.6, 9.4 and 21.1%, respectively. The corresponding relative biological values for these proteins were listed as 100, 80, 73 and 33. A method for the estimation of the protein minimum for nitrogen equilibrium for any dog, employing only one experimental period, has been described.