PMID: 36502May 1, 1979

Characteristics of the proteins of unicellular organisms as potential components of ecological life-support systems

Kosmicheskaia biologiia i aviakosmicheskaia meditsina
V A BarashkovI I Gitel'zon


A comparative characterization of the biological value of proteins from green and blue-green algae, bacteria, and microbial coenosis of straw mineralizing active sludge is given with respect to the fractional composition of total protein, its amino acid composition, and affinity for proteolytic enzymes in vitro. The above microorganisms have an adequate amino acid composition, a high content of essential amino acids, and differ in their content of readily soluble proteins. The presence of protein complexes with other cellular components, for instance lipids and carbohydrates, seems to be responsible for a poor digestibility of these proteins.

Related Concepts

Carbohydrate nutrients
Bacterial Proteins
Complex (molecular entity)
Peptide Hydrolases
Proteolytic enzymes for treatment of wounds and ulcers
Life Support Systems, Regenerative
Physiological Sludge

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