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PAGE analysis of poly-P synthesized by B. cereus PPK. The products of incubation of [γ-32P]ATP with 40 ng of purified B. cereus PPK or 20 ng of E. coli PPK at 37°C for 30 min were separated by 20% PAGE containing 7 M urea, and visualized with a PhosphorImager (Molecular Dynamics).
