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pkg of 2 × 10,000 U
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文献和实验4-9 except phosphate, avoid calcium chelators, add 50% glycerol for storage as liquid at -20C. Aliquot avoid repeated freeze/thaw cycles. Special care must be taken with deoxyribonuclease. Mix gently to avoid shear denaturation. In general, Dnase I is activated
while retaining the oligo-dT bound poly(A)-RNA. After several washing steps under conditions less stringent than for annealing, poly(A)-RNA is eluted in water or low salt Tris buffer. Elution volumes vary from 20-250 μl for most kits accepting up to 1 mg of total
Measurement of GFP Expression and DNA Content in Permeabilized Cells
iodide stock solution (1mg/ml in PBS) DNAse-free ribonuclease A 12 X 75 mm culture tubes Vortex mixer Waterbath at 37o C Method Fix cells with formaldehyde 1. Count cells. 2. Place approximately 106 cells
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