Comparison of human lactoferrins from milk and neutrophilic leucocytes. Relative molecular mass, isoelectric point, iron-binding properties and uptake by the liver
- PMID: 4038272
- PMCID: PMC1145067
- DOI: 10.1042/bj2290353
Comparison of human lactoferrins from milk and neutrophilic leucocytes. Relative molecular mass, isoelectric point, iron-binding properties and uptake by the liver
Abstract
Human lactoferrins isolated from neutrophilic leucocytes and milk by CM-Sephadex chromatography were similar in Mr (76000) and pI (8.7). Upon acidification, both proteins released their two Fe3+ ions/molecule in a similar biphasic way. Both proteins intravenously injected into mice were cleared from plasma at the same rate. The maximal uptakes by the liver, which occurred 5 min after injection, were inhibited to the same extent by milk lactoferrin used as a competitor.
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