Yu:ChIP elution buffer

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 * +Solution recipe for ChIP elution buffer for 50ml.
 * 1. 2.5ml 1M Tris
 * 2. 1 ml of 0.5M EDTA
 * 3. 5ml of 10% SDS
 * 4. 41.5ml water
 * 3. 5ml of 10% SDS
 * 4. 41.5ml water
 * 4. 41.5ml water