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Digestion of an exogenous protein by rat yolksac cultured in vitro

K. E. Williams, J. B. Lloyd, M. Davies, F. Beck
Biochemical Journal Nov 01, 1971, 125 (1) 303-308; DOI: 10.1042/bj1250303
K. E. Williams
Tenovus Institute for Cancer Research, Welsh National School of Medicine, Heath, Cardiff CF4 4XX, U.K.
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J. B. Lloyd
Tenovus Institute for Cancer Research, Welsh National School of Medicine, Heath, Cardiff CF4 4XX, U.K.
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M. Davies
Tenovus Institute for Cancer Research, Welsh National School of Medicine, Heath, Cardiff CF4 4XX, U.K.
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F. Beck
Tenovus Institute for Cancer Research, Welsh National School of Medicine, Heath, Cardiff CF4 4XX, U.K.
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Abstract

Yolk-sacs were removed from 17.5-day pregnant rats injected 2–5h previously with 125I-labelled bovine serum albumin. The specific activities of acid phosphatase and acid proteinase, and the specific radioactivities (trichloroacetic acid-insoluble and trichloroacetic acid-soluble) were measured in subcellular fractions prepared by homogenization and differential centrifugation. The conversion of acid-insoluble into acid-soluble radioactivity within cultured tissue was followed and the nature of the liberated products was investigated by gel chromatography. The results are consistent with the protein entering lysosomes and being digested there. The radiolabel was released chiefly as free iodotyrosine.

  • © 1971 London: The Biochemical Society
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November 1971

Volume: 125 Issue: 1

Biochemical Journal: 125 (1)
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Digestion of an exogenous protein by rat yolksac cultured in vitro
K. E. Williams, J. B. Lloyd, M. Davies, F. Beck
Biochemical Journal Nov 1971, 125 (1) 303-308; DOI: 10.1042/bj1250303
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Digestion of an exogenous protein by rat yolksac cultured in vitro
K. E. Williams, J. B. Lloyd, M. Davies, F. Beck
Biochemical Journal Nov 1971, 125 (1) 303-308; DOI: 10.1042/bj1250303

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