*Lipoxygenase and Colon Cancer DOI: http://dx.doi.org/10.5772/intechopen.99638*

#### **Figure 3.**

*Activity and absorbance at 280 nm for the fraction of ion exchange step by using DEAE cellulose A-50 resin.*

soybeans, where the number of times of purification was 7.7 times at yield of 41% [38]. The enzyme was also purified from Human Placenta with a yield of 21.84% [39].

#### **3.2 Measurement of GGT activity in blood serum**

The results of the statistical analysis also showed a higher activity of GGT in colon cancer patients compared to control as shown in **Figure 4**.

Previous scientific literature has indicated a high GGT activity in the serum of colon cancer patients [40, 41]. The reason for the high activity of GGT is due to that the GGT is involved in generating free radicals and peroxidation


#### **Figure 4.**

*The activity of GGT in sera of patients and control groups.*

of unsaturated fatty acids, which are involved in various stages of tumorigenesis [42, 43].
