Albuminoids
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
This 1930s encyclopedia article defines albuminoids as a group of proteins found primarily in supporting tissues and epidermal structures. It notes their characteristic insolubility in common protein solvents and high chemical resistance, listing key examples such as keratin, collagen, and glutin.
Encyclopedia entry (1928–1936)
ALBUMINOIDS, or scleroproteins, a group of proteins entering principally into the composition of supporting tissue and epidermal formations. As a rule, albuminoids are found in the animal organism in an insoluble state; they are characterized by difficult solubility in ordinary protein solvents and great resistance to chemical reagents. The most important albuminoids are: keratin (in the skin, horn, hair, etc.), collagen (in connective tissue), and glutin (animal glue).
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“Albuminoids.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/albuminoids/