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Protein Protocols Protein Protocols

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150<br />

Table 6 (continued)<br />

Centrifugation ← ←<br />

Supernatant III weigh 375 mg e (D) c ← ←<br />

Ampholyte pH 2–4 20 µL ← ←<br />

(supernatant III mg × 0.0526)<br />

Pellet extract, ready for use, ← ←<br />

store frozen in aliquots<br />

2-DE 8 µL/gel 8 µL/gel 7 µL/gel<br />

PS fraction: liver Brain Heart<br />

Pellet III 69 mgd ← ←<br />

Buffer C (pellet III mg × 1.0) 69 µL ← ←<br />

∑6 138<br />

Pellet powder ← ←<br />

Benzonase (∑6 × 0.025) 3.5 µL ← ←<br />

Stirring ← ←<br />

∑7 3.5 + 69g = 73<br />

Urea (∑7 × 1.08) 79 mg ← ←<br />

DTT solution (∑7 × 0.1) 7.3 µL ← ←<br />

Stirring ← ←<br />

Ampholyte pH 2.0–4.0 ←, Pellet factor 0.56 ←, Pellet factor 0.25<br />

[(pellet III mg × 0.3) + ∑7] × 0.1 9.4 µL<br />

Pellet suspension, ready for use,<br />

store frozen in aliquots<br />

2-DE 9 µL/gel 8 µL/gel 8 µL/gel<br />

a All factors used in this table are explained in Note 3.<br />

b This figure is given as an example. The amount of the starting material may vary from 240 to 260 mg (see Note 5).<br />

c B ÷ A = control value; D ÷ C = control value (see Note 4).<br />

d This figure is given as an example and is not the result of a calculation. The pellet weight varies because slight losses of material are unavoidable, even during<br />

very precise work.<br />

eSee d for pellets; this also holds true for supernatants.<br />

fBuffer B/CHAPS volume.<br />

gBuffer C.<br />

150 Klose

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