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Appl Environ Microbiol. 1964 July; 12(4): 292-294
Copyright © 1964 American Society for Microbiology. All Rights Reserved.

Amino Acid Composition of Bulk Protein of Euglena Grown in Waste Water

Sanitary Engineering Laboratories, Technion, Israel Institute of Technology, Haifa, Israel

ABSTRACT

The amino acid content of bulk protein in a sewage-grown Euglena sp. was examined. Concentrations of the essential amino acids, threonine, histidine, tryptophan, and valine, were similar to those found in other algae. The concentration of alanine was much higher. Methionine was not found at all, proline only in traces, and other amino acids at low concentrations. These results indicate that the amino acid content of bulk protein of the species of Euglena studied resembles that of plants far more closely than that of animals.