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centrifugation, the supernatant was removed and the pellet resuspended <strong>in</strong> 50 μl of<br />

chilled Cell Lysis Buffer (conta<strong>in</strong><strong>in</strong>g Sodium Chloride, Potassium Chloride, Sodium<br />

Phosphate Dibasic, Potassium Phosphate Monobasic,Triton X100 and Water) before<br />

<strong>in</strong>cubated on ice for 10 m<strong>in</strong>utes. Follow<strong>in</strong>g the addition of Cell Lysis Buffer, samples<br />

taken to microcentrifugation tube from falcon and centrifugation was performed at<br />

maximum speed 14.000 rpm (~10.000g) for 1 m<strong>in</strong>utes at 4˚C. Supernatant, which is the<br />

total prote<strong>in</strong> of our samples, transferred to a fresh tube and used for further studies (2D-<br />

PAGE).<br />

3.2.8. Determ<strong>in</strong>ation of Prote<strong>in</strong> Concentration<br />

Prote<strong>in</strong> concentrations of the samples were determ<strong>in</strong>ed by us<strong>in</strong>g Bradford<br />

method as described above.<br />

3.2.9. 2D-PAGE Analysis<br />

3.2.9.1. Isoelectric Focus<strong>in</strong>g (IEF)<br />

Day One<br />

The first dimension step of 2D PAGE (isoelectric focus<strong>in</strong>g, (IEF)) was<br />

performed on 17 cm-immobil<strong>in</strong>e strips which provided a l<strong>in</strong>ear gradient from pH 3 to<br />

10 (Bio-Rad) by a PROTEAN IEF Cell (Bio-Rad).<br />

Firstly, strips were taken out from -20°C freezer and waited <strong>in</strong> the room<br />

temperature till rehydration buffer is prepared (preparation of the buffer was given <strong>in</strong><br />

Appendix B). Before the experiment, IEF rehydration tray was cleaned and dried. The<br />

passive rehydration was choosen for the rehydration step.<br />

strip.<br />

Table 3.3 <strong>in</strong>dicates the amount of recommended prote<strong>in</strong> sample to load per IPG<br />

58

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