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  • Title: Purification and molecular cloning of chymase from human tonsils.
    Author: Sukenaga Y, Kido H, Neki A, Enomoto M, Ishida K, Takagi K, Katunuma N.
    Journal: FEBS Lett; 1993 May 24; 323(1-2):119-22. PubMed ID: 8495723.
    Abstract:
    A chymotrypsin-like protease was purified to homogeneity from human tonsils by a series of chromatographic procedures. The purified enzyme gave a single protein band with an apparent molecular mass of 30 kDa on SDS-PAGE. The sequence of the first 21 amino acids at the N-terminus of the enzyme was determined. A cDNA for the enzyme was cloned by PCR amplification from extracted tonsillar mRNA using a supposed N-terminal oligonucleotide primer and a conserved C-terminal primer of the chymase family. The deduced amino acid sequence of the isolated clone was identical to that of human chymase in connective tissue-type mast cells from heart except for a Ser instead of a Cys at the N-terminal 7th position.
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