Author(s): Stošić Svetlana, Divjak Isidora, Ješiđ Snežana, Nešić V, Račić A, Popović Neda
Keywords:IgG, immune response, phylogenetic antibody structure
Even though the green frog (Rana esculenta) is often used as an experimental model for further studies of physiological laws, little is still known about its serum proteins and their role in immunity. Its serum proteins have been studied quite extensively, as when they are taken up into the organism of another animal they represent antigens themselves. In this work, an attempt was made to isolate some frog serum proteins and to investigate the electrophoretic qualities of the isolated components (electrophoresis on agar gel and immunoelectrophoresis). IgG was isolated using the same procedure applied for human sera and one of the components found in the beta globulin zone was isolated from frog serum by the same procedure. Immunoelectrophoretic analysis, carried out with the full antiserum of a rabbit, obtained by immunisation of the rabbit with the frog serum, showed that the isolated component was pure. The obtained results confirm the fact that there are no slow gamma globulins in the frog serum and point out that this procedure, used for isolating human IgG class, is also suitable for isolating one protein component from the serum of the frog, which has the electrophoretic speed of beta globulin and which may represent one category of frog immunoglobulins.
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