Development of a Rapid and Simple Method for Detection of Protein Contaminants in Carmine

Figure 4

(a) Images of carmine suspensions in SDS-PAGE running buffer. Left: Sample C (carminic acid purified using divinylbenzene resin, Kishi Kasei). Middle: Sample B (carminic acid, Kishi Kasei). Right: Sample A (cochineal extract, Biocon). (b) SDS-PAGE results for protein contaminants in carmine with the Nanosep 3 K Omega.

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