Abstract
The contents of essential amino acids and chemical score as indices of nutritive value of the cell-free protein obtained from fresh scenedesmus cell were investigated.
The amino acids were determined by microbiological method, and chemical score was calculated on the basis of the information on the amino acid requirement for adult rat and the essential amino acids contents of whole egg protein. The essential amino acids contents of the isolated scenedesmus protein were similar to those of many algal proteins reported by a number of investigators. The sulfur-containing amino acids contents of the isolated protein were found to be much lower than those of egg protein, and these amino acids constitute the limitting factor of nutritive value of the protein. Its chemical score, 57, therefore, was lower than that of egg protein. This value agreed well with the biological value of the protein obtained previously with adult rats.
