3.4.22.41	for isozyme CF-4, the purified recombinant protein (10 mg) is slowly added to 1 l of 100 mM Tris-HCl (pH 8.0) containing 1 mM EDTA, 250 mM L-arginine, 5 mM reduced glutathione, and 1 mM oxidized glutathione and gently stirred at 4°C for 20 h. Isozyme CF-11 is refolded in 100 mM Tris-HCl (pH 8.0) containing 1 mM EDTA, 250 mM L-arginine, 10 mM reduced glutathione, and 1 mM oxidized glutathione with the same method	709866