Synthetic peptide (RRRDDDSDDD). Km: ~60mM Vmax: ~2.2mmole/min/mg with Casein Kinase 2 Molecular Weight: 1264D Quality Control: Evaluated in enzyme assays wih purified casein kinase 2. Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 6 months after receipt at -20C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.