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Chymopapain. Chromatographic purification and immunological characterization.


ABSTRACT: Chymopapain (EC 3.4.22.6) was purified from commercially available spray-dried latex of papaya (Carica papaya) fruit by (NH4)2SO4 fractionation and fast protein chromatography on the Mono S cation-exchange column. Multiple forms of chymopapain separated chromatographically were shown to be immunologically identical. A major form was isolated and found to be homogeneous by several criteria, and fully active, and its N-terminal amino acid was identified as tyrosine. Latex from fresh unripe papaya fruit contained predominantly one form of chymopapain, and it is concluded that chymopapain is a single enzyme distinct from the other cysteine proteinases of C. papaya latex.

SUBMITTER: Buttle DJ 

PROVIDER: S-EPMC1144267 | biostudies-other | 1984 Oct

REPOSITORIES: biostudies-other

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