| abstract |
PCT No. PCT/EP91/01145 Sec. 371 Date Feb. 19, 1993 Sec. 102(e) Date Feb. 19, 1993 PCT Filed Jun. 20, 1991 PCT Pub. No. WO91/19993 PCT Pub. Date Dec. 26, 1991.The present invention provides a method of assessment of the concentration of a subset of variants in a population of proteinaceous analyte variants capable of separation by a fractionation system, wherein said population of variants are contacted with a population of labelled proteinaceous specific binding partners therefor to form labelled binding partner-analyte complexes therewith, which are then subjected to separation by the said fractionation system into one or more fractions containing said subset of analyte variants in complexed form and assessment of the amount of label in one or more fractions so obtained, the said population of specific binding partners having, prior to reaction, substantially uniform distribution or mobility in said fractionation system, compositions and test kits for use in such methods. The method of the invention is particularly suitable for the analysis of variants of the protein transferrin. |