Aspergillus niger and Rhizopus species as described in section 3.4 (each carrying
20µg of proteins) were mixed with loading buffer in 1:1 ratio. The loading buffer was prepared as described in Appendix 8. The mixtures were thoroughly mixed by
vortexing and the homogenized mixtures heated at 95°C for 5 minutes in a Dry Bath Incubator. After heating, the mixtures were vortexed again. The mixtures were loaded into wells in cast gel placed in a running buffer (prepared as shown in Appendix 9) using micro-syringes. The cast gel was prepared as shown in Appendix 10. A standard marker produced by Sigma-Aldrich Company, USA, containing proteins of known molecular weights was loaded alongside the samples. The gel was run at 80 V and
100 mA. As soon as the tracking dye entered the resolving gel, the voltage and the current were changed to 100 V and 120 mA to facilitate better running of the proteins through the gel. The electrophoresis was run for three hours (Bolt and Mahoney,
1997). After electrophoresis, the gel was stained in Coomassie Brilliant Blue solution (comprising 40% distilled water, 10% acetic acid, 50% methanol and 0.25% by weight of Coomassie Brilliant Blue R-250; the Coomassie Brilliant Blue R-250 was dissolved in the methanol before adding acetic acid and water) for 2 hours on a shaker. Thereafter, the gel was destained for 2 hours in a solution comprising 67.5% distilled water, 7.5% acetic acid and 25% methanol on a shaker. The solution was replaced from time to time to enhance result.