[Comparison of two methods of rapid separation of serum trancobalamins (author's transl)].

We have compared different methods for the assay of unsaturated B12 binding capacity of the whole serum and of each of the three transcobalamins (TC I - TC II - TC III). This comparison was important to check the conditions of reproducibility of each method; moreover it has led us to arrive at some modifications to resolve the larger fraction (TC I + TC III) into two distinct components.