Component
Copper complexation in cell-free chemical assays
Copper complexation in cell-free chemical assays. Interpret through the linked experimental species, preparation, compartment and exposure; no universal causal effect is implied.
1 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
What acts on it
The tested cyanidin compounds and elderberry preparations had low copper-chelating activity despite their metal-reducing reactions.
Experimental context and source evidence
- evidence_access
- Primary article abstract read in indexed publisher/author-hosted result; publisher full text unavailable. Exact pH series and extract/metal ratios not extracted.
- experimental_model
- Cell-free standardized spectrophotometric comparisons.
- interpretation_status
- Source-derived extraction of a fact-checked reference; access is explicit, not independent raw-data verification.
- limitations
- Low is not zero. Does not establish a clinical copper-depleting effect; extract composition and pH matter.
- plain_language
- The tested cyanidin compounds and elderberry preparations had low copper-chelating activity despite their metal-reducing reactions.
- primary_references
- Fruit extracts of 10 varieties of elderberry (Sambucus nigra L.) interact differently with iron and copper | 2016 | DOI 10.1016/j.phytol.2016.10.025 | https://doi.org/10.1016/j.phytol.2016.10.025
- source_locator
- Reviewed reference lines 88-88; exact primary location described in quoted passage where extracted.
Anthocyanins: detailed mechanisms of action (reviewed 4 October 2026) · lines 88–88
Original AI-assisted review of primary studies and, where relevant, official regulatory records. Access level is retained per claim. Corrections, null results and unresolved questions remain explicit. Not publisher full text or independent replication. · supports · Cell-free standardized spectrophotometric comparisons. · source_derived_draft · unverified_draft
**Iron binding and metal reduction are different reactions.** Purified cyanidin, C3G and standardized elderberry extracts chelated iron and reduced iron and copper in cell-free assays; copper-chelating activity was relatively low. Extract behavior varied and was not completely explained by pigment concentration. Binding a metal, changing its oxidation state and reducing intestinal absorption are three different endpoints. This does not establish removal of intracellular metals or protection from ferroptosis in people. [Mladěnka et al., 2016](https://doi.org/10.1016/j.phytol.2016.10.025).
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.