Summary
A simple method for purification of human prothrombin from ACT) plasma of one single
individual is described. This method is based on three steps :
1. isolation of crude prothrombin complex by barium citrate adsorption;
2. first purification by hydroxyapatite chromatography;
3. further purification by DEAE Sephadex chromatography.
The final product was obtained with a good yield and exhibited less than 5 p. cent
contamination. The human purified prothrombin obtained in this way displays :
– one single chain by SDS electrophoresis,
– a molecular weight of 75,000-80,000 daltons,
– a pi value pH 4.4 by electrofocusing,
– Alanine as थ terminal residue.
Amino-acid analysis is reported.