Abstract
Selected transferrin phenotypes from 14 horses were investigated by antigen-antibody crossed electrophoresis. Horse sera were subjected to starch gel electrophoresis followed by right angle electrophoresis in agarose gels containing rabbit produced anti-horse transferrin. This technique gave an additional zone in the front as compared with 2 transferrin zones seen after ordinary starch gel electrophoresis. Comparisons of transferrin concentrations in horse sera were performed by an immunodiffusion technique. Values were related to a chosen reference serum. A total of 372 horses (210 Norwegian Trotters and 162 Warmblood Trotters) were investigated. There were considerable variations among horses, with the highest transferrin value 196% and the lowest 55% of the standard. There were highly significant differences between average values of certain transferrin phenotypes, the highest being TfFF and the lowest TfDO, TfFO and TfRR. In animals with the same transferrin phenotype, the average transferrin values were significantly higher in foals than in mares. No difference in transferrin values were found between sexes.
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