Binding of digitoxin and some related cardenolides to human plasma proteins

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Binding of digitoxin and some related cardenolides to human plasma proteins.

Tritium-labeled digitoxin, digitoxigenin, digoxin, and digoxigenin of established purity and chemcal authenticity were used to study the binding of these compounds to human plasma proteins. 97% of digitoxin in plasma was nondialyzable. Continuous flow paper electrophoresis of plasma containing digitoxin and dialysis experiments in which human serum albumin competed for the glycoside with plasma...

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Manganese and Iron Binding to Human Transferrin

The characteristics of manganese and iron binding to human apotransferrin (apo-tf) have been investigated and compared in this study. Both metal ions were taken up by human apo-tf and formed complexes, with the maximum absorbances observed at 410 and 340 nm for manganese-transferrin (Mn-tf) and 465 nm for iron-transferrin (Fe-tf). Addition of manganese (1.5 µg/ml) to the reaction mixture contai...

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The binding of plasma proteins to human placental cell membranes.

1. To investigate the relative degree. to which human IgG and other plasma proteins bind to cell membranes of the full-term human placenta, suspensions of membranes mixed with radio-iodinated proteins were incubated at pH 6.5 and subjected to Sepharose 2B column chromatography. The amount of labelled protein associated with membrane protein in membrane-containing fractions of the eluate was the...

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Synthetic cardenolides and related products.

ABSTRACT Since the publication in 1785 of one of the great classics of clinical medicine, 'An Account of the Foxglove and Some of its Medical Uses' by William Withering', the steroidal glycosides of digitalis have maintained a unique position among drugs. Their usefulness as life saving products is unchallenged and yet very few drugs are known to possess a narrower margin of safety. Their toxic...

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ژورنال

عنوان ژورنال: Journal of Clinical Investigation

سال: 1969

ISSN: 0021-9738

DOI: 10.1172/jci106060