Acid proteinase of chicken liver. Purification and properties (author's transl)

A method for purifying the haemoglobinolitic activity to acid pH in chicken liver is described. The purified preparation contains cathespin D activity since it is inhibited by diazoacetyl-DL-norleucine methylester in the presence of cupric ions, while thiol-enzyme reagents do not affect it. The mole...

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Published inRevista espanola de fisiologia Vol. 36; no. 1; p. 63
Main Authors Barceló, F, Vives, N, Bozal, J
Format Journal Article
LanguageSpanish
Published Spain 01.03.1980
Subjects
Animals
Chickens - metabolism
Hydrogen-Ion Concentration
Liver - enzymology
Peptide Hydrolases - isolation & purification
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Abstract A method for purifying the haemoglobinolitic activity to acid pH in chicken liver is described. The purified preparation contains cathespin D activity since it is inhibited by diazoacetyl-DL-norleucine methylester in the presence of cupric ions, while thiol-enzyme reagents do not affect it. The molecular weight of the enzyme is approximately 40,000--45,000 and the pH optimum against haemoglobin and bovine serum albumin is 3.5-3.7. The rate of degradation of albumin and casein is much less than that of haemoglobin. Cathepsin D preparations with different purification degrees, exhibit a similar percentage of activation at acid pH; the highest activation is observed at pH 3.1-3.3.
AbstractList A method for purifying the haemoglobinolitic activity to acid pH in chicken liver is described. The purified preparation contains cathespin D activity since it is inhibited by diazoacetyl-DL-norleucine methylester in the presence of cupric ions, while thiol-enzyme reagents do not affect it. The molecular weight of the enzyme is approximately 40,000--45,000 and the pH optimum against haemoglobin and bovine serum albumin is 3.5-3.7. The rate of degradation of albumin and casein is much less than that of haemoglobin. Cathepsin D preparations with different purification degrees, exhibit a similar percentage of activation at acid pH; the highest activation is observed at pH 3.1-3.3.
Author Barceló, F
Vives, N
Bozal, J
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Snippet A method for purifying the haemoglobinolitic activity to acid pH in chicken liver is described. The purified preparation contains cathespin D activity since it...
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StartPage 63
SubjectTerms Animals
Chickens - metabolism
Hydrogen-Ion Concentration
Liver - enzymology
Peptide Hydrolases - isolation & purification
Title Acid proteinase of chicken liver. Purification and properties (author's transl)
URI https://www.ncbi.nlm.nih.gov/pubmed/6994180
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