Evidence map›Paper›PMID 31889966›Full record

ArticleFrontiers in zoology2019

Eumelanin and pheomelanin pigmentation in mollusc shells may be less common than expected: insights from mass spectrometry.

Susanne Affenzeller, Klaus Wolkenstein, Holm Frauendorf, Daniel J Jackson

Open access · goldAbstract read
In one paragraph

Article in Frontiers in zoology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
1.5field-weighted citation impact, top 20% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed, 33 citations in OpenAlex.

  1. Article
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  3. Review
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  5. Xanthurenic Acid in the Shell Purple Patterns ofMolecules (Basel, Switzerland) · 2021
    Article
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  7. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 1 institution in 1 country.

Susanne Affenzeller1Department of Geobiology, Georg-August University of Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany.
Klaus Wolkenstein1Department of Geobiology, Georg-August University of Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany.
Holm Frauendorf2Institute of Organic & Biomolecular Chemistry, Georg-August University of Göttingen, Tammannstr. 2, 37077 Göttingen, Germany.
Daniel J Jackson1Department of Geobiology, Georg-August University of Göttingen, Goldschmidtstr. 3, 37077 Göttingen, Germany.ORCID 0000-0001-9045-381X
University of Göttingen · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe geometric patterns that adorn the shells of many phylogenetically disparate molluscan species are comprised of pigments that span the visible spectrum. Although early chemical studies implicated melanin as a commonly employed pigment, surprisingly little evidence generated with more recent and sensitive techniques exists to support these observations.

resultsHere we present the first mass spectrometric investigations for the presence of eumelanin and pheomelanin in 13 different molluscan species from three conchiferan classes: Bivalvia, Cephalopoda and Gastropoda. In the bivalve

conclusionsWe recommend methods such as high-performance liquid chromatography with mass spectrometric detection for the analysis of complex biological samples to avoid potential false-positive identification of melanin. Our results imply that many molluscan species employ as yet unidentified pigments to pattern their shells. This has implications for our understanding of how molluscs evolved the ability to pigment and pattern their shells, and for the identification of the molecular mechanisms that regulate these processes.

Indexed as

Colour patternEumelaninLiquid chromatography–mass spectrometryMolluscPheomelaninPigmentShell

Identifiers

PMID31889966
PMCPMC6929474
OpenAlexW2994685039

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.