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Figure 1. Silver-stained SDS-PAGE gel of purified recombinant equine interleukin-1β. Molecular weights of protein standards of comparable size are indicated to the left of lane 1. The major band (reIL-1β) in lane 2 corresponds to the 21 kD product. Negligible additional staining (arrows) indicates the purity of the protein isolated using the Ni2+ chromatographic method.
