ISSN:
1432-069X
Keywords:
Cystatin
;
Cysteine proteinase inhibitor
;
human hair
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract We found a cysteine proteinase inhibitor in human hair shaft extract treated with 0.01 M Tris HCl buffer, pH 8.0. A yield of 0.2 mg of purified cysteine proteinase inhibitor was obtained from 86 g of hair shaft. The cysteine proteinase inhibitor had a molecular mass of 13 kDa as determined by high-performance liquid chromatography and sodium dodecyl sulfate polyacrylamide gel electrophoresis. It was more stable to heat and pH than most proteins and had a pI of 4.7. Immunologically, its antigenicity was the same as that of cystatin A, but differed from that of cystatin B and C, and kininogen. The amino-acid sequence of the first 30 residues from the NH terminus of the inhibitor was identical to that of cystatin A from human epidermis. Hair shaft cysteine proteinase inhibitor is thus considered to be identical to epidermal cystatin A.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00372066
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