[Characteristics of biologically active mannan substances, isolated from fodder yeast]

The component composition and antiviral properties of the mannan-containing preparations were studied. These preparations were extracted from some laboratory and commercial specimens of the fodder yeast cultivated on different substrates. It was shown, that the main component of pure preparation was the mannan which had molecular mass near 13 kDa. The monosaccaride composition of mannan component was varied depending on the source, degree of purification, methods of purification of the preparations. However, the crude and pure mannan preparations activity relatively to VTV was approximately equal.