Purification steps Total proteins
mg/ml
Total activity
U
Specific  activity (U/mg) Fold purification % yield
Crude extract 6024.28 361456 60 1 100
Precipitation 620.42 359843 580 9.66 99.55
DEAE-cellulose chromatography 160.14 316436 1976 32.99 87.54
Sephadex G-75 chromatography 70.86 271748 3835 63.91 75.18
Table 2: Purification steps of SOD from sewage isolate bacteria.