Representative applications of heparin-sepharose in the removal of polyamines from biological materials.

Many experimental systems would greatly benefit from the availability of a simple and effective technique to remove polyamines from biological materials. We have examined the possibility of utilizing heparin-sepharose in the removal of polyamines from rat heart mitochondria, DNA-spermine complex, and fetal calf serum. Heparin-sepharose removes 90% of spermine adsorbed to the cytoplasmic surface of rat heart mitochondria. Heparin-sepharose almost totally removes spermine from DNA-spermine complex, leaving less than 0.003 mol spermine/mol DNA phosphorus. Heparin-sepharose is highly effective in removing spermine and spermidine (99.5 and 95% adsorbed, respectively) from fetal calf serum. Under the same experimental conditions only 50% of putrescine is adsorbed. A higher amount of resin corresponding to an increased capacity for putrescine must be used to achieve a satisfactory removal of putrescine.