Evidence map›Paper›PMID 33414551›Full record

ArticleNature genetics2021

Differences between germline genomes of monozygotic twins.

Hakon Jonsson, Erna Magnusdottir, Hannes P Eggertsson, Olafur A Stefansson, Gudny A Arnadottir, Ogmundur Eiriksson, Florian Zink, Einar A Helgason, Ingileif Jonsdottir, Arnaldur Gylfason and 13 more

Abstract readTwin Study
PubMed Publisher
In one paragraph

Article in Nature genetics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 84 papers.

0numbers the graph read from it
0cells of the map it votes in
84citing papers in PubMed
12.2field-weighted citation impact, top 1% 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

84 citing papers in PubMed, 176 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Reconstruction of Cell Diversity and Cell Lineages from Somatic Mutations in Single-Cell Transcriptomic Data.DNA research : an international journal for rapid publication of reports on genes and genomes · 2026
    Article
  5. Article
  6. Article
  7. A sibling study of variation in parental mutation rates.bioRxiv : the preprint server for biology · 2026
    Article
  8. Article
  9. Disease insights from brain somatic mosaicism.Experimental & molecular medicine · 2026
    Review
  10. Article
  11. Article
  12. Article
  13. Clinical Variability of ADPKD in Monozygotic Twins.Kidney international reports · 2026
    Article
  14. Forensic genetics in the omics era.Nature reviews. Genetics · 2026
    Review
  15. Article
  16. What sets the mutation rate of a cell type in an animal species?bioRxiv : the preprint server for biology · 2025
    Article
  17. Article
  18. Article
  19. Article
  20. Clonal dynamics of monozygotic twinning in early human embryogenesis.bioRxiv : the preprint server for biology · 2025
    Article

24 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

23 authors at 3 institutions in 1 country.

Hakon JonssondeCODE genetics/Amgen, Reykjavik, Iceland. hakon.jonsson@decode.is.ORCID http://orcid.org/0000-0001-6197-494X
Erna MagnusdottirFaculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland.ORCID http://orcid.org/0000-0002-3369-4390
Hannes P EggertssondeCODE genetics/Amgen, Reykjavik, Iceland.ORCID http://orcid.org/0000-0002-1674-9978
Olafur A StefanssondeCODE genetics/Amgen, Reykjavik, Iceland.
Gudny A ArnadottirdeCODE genetics/Amgen, Reykjavik, Iceland.ORCID http://orcid.org/0000-0001-6571-423X
Ogmundur EirikssondeCODE genetics/Amgen, Reykjavik, Iceland.
Florian ZinkdeCODE genetics/Amgen, Reykjavik, Iceland.
Einar A HelgasondeCODE genetics/Amgen, Reykjavik, Iceland.
Ingileif JonsdottirdeCODE genetics/Amgen, Reykjavik, Iceland.ORCID http://orcid.org/0000-0001-8339-150X
Arnaldur GylfasondeCODE genetics/Amgen, Reykjavik, Iceland.
Adalbjorg JonasdottirdeCODE genetics/Amgen, Reykjavik, Iceland.
Aslaug JonasdottirdeCODE genetics/Amgen, Reykjavik, Iceland.
Doruk BeyterdeCODE genetics/Amgen, Reykjavik, Iceland.
Thora SteingrimsdottirFaculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland.
Gudmundur L NorddahldeCODE genetics/Amgen, Reykjavik, Iceland.
Olafur Th MagnussondeCODE genetics/Amgen, Reykjavik, Iceland.
Gisli MassondeCODE genetics/Amgen, Reykjavik, Iceland.
Bjarni V HalldorssondeCODE genetics/Amgen, Reykjavik, Iceland.ORCID http://orcid.org/0000-0003-0756-0767
Unnur ThorsteinsdottirdeCODE genetics/Amgen, Reykjavik, Iceland.
Agnar HelgasondeCODE genetics/Amgen, Reykjavik, Iceland.ORCID http://orcid.org/0000-0002-8545-3767
Patrick SulemdeCODE genetics/Amgen, Reykjavik, Iceland.ORCID http://orcid.org/0000-0001-7123-6123
Daniel F GudbjartssondeCODE genetics/Amgen, Reykjavik, Iceland. daniel.gudbjartsson@decode.is.ORCID http://orcid.org/0000-0002-5222-9857
Kari StefanssondeCODE genetics/Amgen, Reykjavik, Iceland. kari.stefansson@decode.is.ORCID http://orcid.org/0000-0003-1676-864X
deCODE Genetics (Iceland) · ISUniversity of Iceland · ISReykjavík University · IS

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Despite the important role that monozygotic twins have played in genetics research, little is known about their genomic differences. Here we show that monozygotic twins differ on average by 5.2 early developmental mutations and that approximately 15% of monozygotic twins have a substantial number of these early developmental mutations specific to one of them. Using the parents and offspring of twins, we identified pre-twinning mutations. We observed instances where a twin was formed from a single cell lineage in the pre-twinning cell mass and instances where a twin was formed from several cell lineages. CpG>TpG mutations increased in frequency with embryonic development, coinciding with an increase in DNA methylation. Our results indicate that allocations of cells during development shapes genomic differences between monozygotic twins.

Indexed as

Genome, HumanEmbryonic DevelopmentFemaleGene FrequencyGerm CellsHumansMaleMosaicismMutationTwins, MonozygoticZygote

Identifiers

PMID33414551
OpenAlexW3120961615

What OpenQuestion holds

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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.