Can anyone share the idea about the cold extraction of collagen from chicken feet by using papain enzyme at 4 degree centrigrade?

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Ngee Han Lim

Looks like some of my Malaysian compatriots have done just that, and compared between papain and pepsin extraction at 4 deg:

http://waset.org/Publication/isolation-and-characterization-of-collagen-from-chicken-feet/9997777

Ya-nan Wang

Pepsin seems better in the extraction of collagen molecule at 4 oC