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Protein Protocols Protein Protocols

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149<br />

SI + II fraction: liver Brain Heart<br />

Aliquot of supernatant I + II (store rest ← ←<br />

of supernatant I + II frozen) 50 µL<br />

Urea (50 µL × 1.08) 54 mg ← ←<br />

DTT solution (50 µL × 0.1) 5 µL ← ←<br />

Ampholyte pH 2–4 (50 µL × 0.1) 5 µL ← ←<br />

Final volume of 50 µL supernatant ← ←<br />

plus additives 400 µL<br />

Diluent 100 µL No diluent Diluent<br />

Supernatant I + II, ready for use, 200 µL ← ←<br />

store frozen in aliquots<br />

2-DE 8 µL/gel 9 µL/gel 6 µL/gel<br />

PE fraction: liver Brain Heart<br />

Pellet II weigh 92 mgd (C) c ← ←<br />

Buffer B/CHAPS (pellet II mg × 1.6) 147 µL ←, Factor 1.4 ←, Factor 2.2<br />

900 µL buffer B 900 µL buffer B 900 µL buffer B<br />

73 mg CHAPS (displace 69 µL) 77 mg CHAPS 65 mg CHAPS<br />

31 µL bidistilled water 27 µL bidistilled water 38 µL bidistilled water<br />

1000 µL buffer B/CHAPS 1000 µL buffer B/CHAPS 1000 µL buffer B/CHAPS<br />

∑4 239<br />

Inhibitor 1B (∑4 × 0.08) 19 µL ← ←<br />

∑ 5<br />

19 + 147 f = 166<br />

Pellet powder ← ←<br />

Stirring ← ←<br />

Urea ([pellet II mg × 0.3] + ∑ 5) × 1.08 207 mg ←, Pellet factor 0.56 ←, Pellet factor 0.25<br />

DTT solution ←, Pellet factor 0.56 ←, Pellet factor 0.25<br />

([Pellet II mg × 0.3) + ∑ 5]) × 0.1 19 µL<br />

Stirring ← ←<br />

(continued)<br />

Fractionated Extraction 149

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