1 53 inj 4 136iu 1iu 3iu 75iu 55 1 47__________________________________________________________________________ each of the preferred peptide resins demonstrated quantitative capture of the human factor viii applied as shown in the above data table each peptide resin released the biologically competent factor viii in the elution fraction under these specific conditions for each injection of the sample a purification of 1 to 2 fold was observed fig7 and 9 show the sds page and western blot profiles for the second and third injection fractions from each of the preferred peptide resins each of the sds page profiles from the flow through salt and elution are consistent within each column run but are different from the other columns suggesting each resin has a different specificity or selectivity for the sample components western blot analyses indicate complete adsorption of the factor viii onto each preferred peptide resin with preferential release in the elution fraction both sds page and western blot analyses confirm the biological assay data presented above other embodiments of the invention will become apparent to one of ordinary skill in the art for instance minor modifications of the six mer peptides disclosed herein that substitute add or delete one or more amino acid residues that are similar in biochemical behavior to those specifically disclosed herein 34 conservative substitutions 34 and that result in similar fviii binding.