Gum resins

... food preservative,sodium chlorite is present in toothpast,chewing gum,shampoo and aqueous cosmetic formulations,.formaldehyde is present in tobocco smoke, resins, crease resistant fabrics and aqueous cosmetic formulations such as shampoos, conditioners, ...

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There are a number of potential problems with nickel chelating resins and metalloproteins. First, the background buffer is typically phosphate which can form soluble and insoluble complexes with metals, leaching them off the protein in the process. Second, ...

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... you see on the gel, or even remove them altogether if high or low ionic strength prevents binding completely. You can also try different IMAC resins to see if there are differences in the banding patterns, again suggesting that they could be non-specifically bound contaminants.

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... chelation matrix. USB, for one, sells a silica-based Ni resin they claim gives lower non-specific binding compared to either IMAC or agarose-type resins.

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... (well, possibly not from G200, but even there I wouldn't think Sephadex could do much for resolving whole cells). There are modified Sephadex resins for ion exchange, but those would have names like DEAE-Sephadex, not Sephadex G10. So, I guess I'm skeptical that the method uses the G10 resin ...

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