Use of principal component analysis for differentiation of gelatine sources based on polypeptide molecular weights

•Method developed for analysing gelatine polypeptides in jellies.•Gelatine extraction with acetone exhibited clear polypeptide profiles on SDS–PAGE.•The integrated method of SDS–PAGE and PCA was demonstrated.•The simple approach may provide a useful tool for gelatine authenticity issues. The study w...

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