Comparative studies on the nonprotein but nondialysable sugar-peptide fraction isolated from the plasma of various classes of vertebrates.
1. The nonprotein but nondialysable ninhydrin-positive substances isolated from plasma of some species belonging to four classes of vertebrates (fishes, amphibians, birds and mammals) were studied. 2. In all species studied (Cyprinus carpio, Salmo gairdneri, Rana esculenta, Rana temporaria, Gallus domestica and Rattus rattus) a similar group of nondialysable ninhydrin-positive substances may be isolated from the plasma by Sephadex G-25 filtration followed by dialysis. 3. Thin-layer Sephadex G-25 electrophoresis disclosed in birds (Gallus domestica) the lack of one ninhydrin-positive band contrary to the species of other classes of vertebrates. 4. Electrochromatography showed in all species studied an alteration in the composition of the basic peptide fractions and in birds the lack of one neutral peptide.
D000818:Animals; D002241:Carbohydrates / Q000097:blood*; D003956:Dialysis; D010455:Peptides / Q000097:blood*; D051381:Rats; D014714:Vertebrates / Q000097:blood*
D002241:Carbohydrates; D010455:Peptides