Abstract

1. 1. Avian plasma was fractionated by sequential ammonium sulfate precipitation, and the carbohydrate composition of the fractions was determined and compared with fractions of porcine and bovine plasmas. 2. 2. The incorporation of radioactivity of labeled hexosamines into avian serum protein fractions, red blood cells and liver slices was investigated. 3. 3. Large differences in the degrees and patterns of association of radioactivity were found when labeled glucosamine, galactosamine and mannosamine were injected in fowl, or incubated with avian red cells or liver slices. 4. 4. The incorporation of labeled hexosamines by red blood cells in vitro may implicate these nucleated cells in glycoprotein synthesis.

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