Preparation of Human Plasminogen Suitable as Substrate for Quantitative Determination of Plasminogen Activators

Abstract
A simple method for preparation of plasminogen with low spontaneous activity and soluble at a neutral pH and at physiological ionic strength is described. Euglobulin made from fresh, oxalated, BaSO4-adsorbed, human plasma was first purified by means of gel filtration on Sephadex G-200. After gel filtration, further purification and concentration was done on DEAE-sephadex A-50. The activity was 100-130 casein units per mg tyrosine.