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Linneberg-Agerholm M, Sell AC, Redó-Riveiro A, Perera M, Proks M, Knudsen TE, Barral A, Manzanares M, Brickman JM. The primitive endoderm supports lineage plasticity to enable regulative development. Cell 2024:S0092-8674(24)00595-6. [PMID: 38917790 DOI: 10.1016/j.cell.2024.05.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 02/27/2024] [Accepted: 05/28/2024] [Indexed: 06/27/2024]
Abstract
Mammalian blastocyst formation involves the specification of the trophectoderm followed by the differentiation of the inner cell mass into embryonic epiblast and extra-embryonic primitive endoderm (PrE). During this time, the embryo maintains a window of plasticity and can redirect its cellular fate when challenged experimentally. In this context, we found that the PrE alone was sufficient to regenerate a complete blastocyst and continue post-implantation development. We identify an in vitro population similar to the early PrE in vivo that exhibits the same embryonic and extra-embryonic potency and can form complete stem cell-based embryo models, termed blastoids. Commitment in the PrE is suppressed by JAK/STAT signaling, collaborating with OCT4 and the sustained expression of a subset of pluripotency-related transcription factors that safeguard an enhancer landscape permissive for multi-lineage differentiation. Our observations support the notion that transcription factor persistence underlies plasticity in regulative development and highlight the importance of the PrE in perturbed development.
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Affiliation(s)
- Madeleine Linneberg-Agerholm
- Novo Nordisk Foundation Center for Stem Cell Medicine (reNEW), University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Annika Charlotte Sell
- Novo Nordisk Foundation Center for Stem Cell Medicine (reNEW), University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Alba Redó-Riveiro
- Novo Nordisk Foundation Center for Stem Cell Medicine (reNEW), University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Marta Perera
- Novo Nordisk Foundation Center for Stem Cell Medicine (reNEW), University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Martin Proks
- Novo Nordisk Foundation Center for Stem Cell Medicine (reNEW), University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Teresa E Knudsen
- Novo Nordisk Foundation Center for Stem Cell Medicine (reNEW), University of Copenhagen, 2200 Copenhagen N, Denmark
| | - Antonio Barral
- Centro de Biología Molecular Severo Ochoa (CBM), CSIC-UAM, 28049 Madrid, Spain
| | - Miguel Manzanares
- Centro de Biología Molecular Severo Ochoa (CBM), CSIC-UAM, 28049 Madrid, Spain
| | - Joshua M Brickman
- Novo Nordisk Foundation Center for Stem Cell Medicine (reNEW), University of Copenhagen, 2200 Copenhagen N, Denmark.
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2
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Youlten SE, Miao L, Hoppe C, Boswell CW, Musaev D, Abdelmessih M, Krishnaswamy S, Tornini VA, Giraldez AJ. Novel cell states arise in embryonic cells devoid of key reprogramming factors. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.13.593729. [PMID: 38798464 PMCID: PMC11118305 DOI: 10.1101/2024.05.13.593729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
The capacity for embryonic cells to differentiate relies on a large-scale reprogramming of the oocyte and sperm nucleus into a transient totipotent state. In zebrafish, this reprogramming step is achieved by the pioneer factors Nanog, Pou5f3, and Sox19b (NPS). Yet, it remains unclear whether cells lacking this reprogramming step are directed towards wild type states or towards novel developmental canals in the Waddington landscape of embryonic development. Here we investigate the developmental fate of embryonic cells mutant for NPS by analyzing their single-cell gene expression profiles. We find that cells lacking the first developmental reprogramming steps can acquire distinct cell states. These states are manifested by gene expression modules that result from a failure of nuclear reprogramming, the persistence of the maternal program, and the activation of somatic compensatory programs. As a result, most mutant cells follow new developmental canals and acquire new mixed cell states in development. In contrast, a group of mutant cells acquire primordial germ cell-like states, suggesting that NPS-dependent reprogramming is dispensable for these cell states. Together, these results demonstrate that developmental reprogramming after fertilization is required to differentiate most canonical developmental programs, and loss of the transient totipotent state canalizes embryonic cells into new developmental states in vivo.
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Affiliation(s)
- Scott E. Youlten
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Liyun Miao
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Caroline Hoppe
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Curtis W. Boswell
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Damir Musaev
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Mario Abdelmessih
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
- Current Address: AstraZeneca, Waltham, MA 02451, USA
| | - Smita Krishnaswamy
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
- Department of Computer Science, Yale University, New Haven, CT 06510, USA
| | - Valerie A. Tornini
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Antonio J. Giraldez
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA
- Yale Stem Cell Center, Yale University School of Medicine, New Haven, CT 06510, USA
- Yale Cancer Center, Yale University School of Medicine, New Haven, CT 06510, USA
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3
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MacCarthy CM, Wu G, Malik V, Menuchin-Lasowski Y, Velychko T, Keshet G, Fan R, Bedzhov I, Church GM, Jauch R, Cojocaru V, Schöler HR, Velychko S. Highly cooperative chimeric super-SOX induces naive pluripotency across species. Cell Stem Cell 2024; 31:127-147.e9. [PMID: 38141611 DOI: 10.1016/j.stem.2023.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 09/02/2023] [Accepted: 11/20/2023] [Indexed: 12/25/2023]
Abstract
Our understanding of pluripotency remains limited: iPSC generation has only been established for a few model species, pluripotent stem cell lines exhibit inconsistent developmental potential, and germline transmission has only been demonstrated for mice and rats. By swapping structural elements between Sox2 and Sox17, we built a chimeric super-SOX factor, Sox2-17, that enhanced iPSC generation in five tested species: mouse, human, cynomolgus monkey, cow, and pig. A swap of alanine to valine at the interface between Sox2 and Oct4 delivered a gain of function by stabilizing Sox2/Oct4 dimerization on DNA, enabling generation of high-quality OSKM iPSCs capable of supporting the development of healthy all-iPSC mice. Sox2/Oct4 dimerization emerged as the core driver of naive pluripotency with its levels diminished upon priming. Transient overexpression of the SK cocktail (Sox+Klf4) restored the dimerization and boosted the developmental potential of pluripotent stem cells across species, providing a universal method for naive reset in mammals.
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Affiliation(s)
| | - Guangming Wu
- Max Planck Institute for Molecular Biomedicine, Münster, Germany; International Bio Island, Guangzhou, China; MingCeler Biotech, Guangzhou, China
| | - Vikas Malik
- Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | | | - Taras Velychko
- Max Planck Institute for Molecular Biomedicine, Münster, Germany; Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Gal Keshet
- Hebrew University of Jerusalem, Jerusalem, Israel
| | - Rui Fan
- Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Ivan Bedzhov
- Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - George M Church
- Department of Genetics, Harvard Medical School, Boston, MA, USA; Wyss Institute, Harvard University, Boston, MA, USA
| | - Ralf Jauch
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China; Centre for Translational Stem Cell Biology, Hong Kong SAR, China
| | - Vlad Cojocaru
- Max Planck Institute for Molecular Biomedicine, Münster, Germany; University of Utrecht, Utrecht, the Netherlands; STAR-UBB Institute, Babeş-Bolyai University, Cluj-Napoca, Romania
| | - Hans R Schöler
- Max Planck Institute for Molecular Biomedicine, Münster, Germany.
| | - Sergiy Velychko
- Max Planck Institute for Molecular Biomedicine, Münster, Germany; Department of Genetics, Harvard Medical School, Boston, MA, USA; Wyss Institute, Harvard University, Boston, MA, USA.
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4
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Poulet A, Kratkiewicz AJ, Li D, van Wolfswinkel JC. Chromatin analysis of adult pluripotent stem cells reveals a unique stemness maintenance strategy. SCIENCE ADVANCES 2023; 9:eadh4887. [PMID: 37801496 PMCID: PMC10558129 DOI: 10.1126/sciadv.adh4887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 09/05/2023] [Indexed: 10/08/2023]
Abstract
Many highly regenerative organisms maintain adult pluripotent stem cells throughout their life, but how the long-term maintenance of pluripotency is accomplished is unclear. To decipher the regulatory logic of adult pluripotent stem cells, we analyzed the chromatin organization of stem cell genes in the planarian Schmidtea mediterranea. We identify a special chromatin state of stem cell genes, which is distinct from that of tissue-specific genes and resembles constitutive genes. Where tissue-specific promoters have detectable transcription factor binding sites, the promoters of stem cell-specific genes instead have sequence features that broadly decrease nucleosome binding affinity. This genic organization makes pluripotency-related gene expression the default state in these cells, which is maintained by the activity of chromatin remodelers ISWI and SNF2 in the stem cells.
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Affiliation(s)
- Axel Poulet
- Department of Molecular Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Arcadia J. Kratkiewicz
- Department of Molecular Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Danyan Li
- Department of Molecular Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Josien C. van Wolfswinkel
- Department of Molecular Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA
- Yale Stem Cell Center, Yale School of Medicine, New Haven, CT 06511, USA
- Yale Center for RNA Science and Medicine, Yale School of Medicine, New Haven, CT 06511, USA
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5
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Tajer B, Savage AM, Whited JL. The salamander blastema within the broader context of metazoan regeneration. Front Cell Dev Biol 2023; 11:1206157. [PMID: 37635872 PMCID: PMC10450636 DOI: 10.3389/fcell.2023.1206157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 07/26/2023] [Indexed: 08/29/2023] Open
Abstract
Throughout the animal kingdom regenerative ability varies greatly from species to species, and even tissue to tissue within the same organism. The sheer diversity of structures and mechanisms renders a thorough comparison of molecular processes truly daunting. Are "blastemas" found in organisms as distantly related as planarians and axolotls derived from the same ancestral process, or did they arise convergently and independently? Is a mouse digit tip blastema orthologous to a salamander limb blastema? In other fields, the thorough characterization of a reference model has greatly facilitated these comparisons. For example, the amphibian Spemann-Mangold organizer has served as an amazingly useful comparative template within the field of developmental biology, allowing researchers to draw analogies between distantly related species, and developmental processes which are superficially quite different. The salamander limb blastema may serve as the best starting point for a comparative analysis of regeneration, as it has been characterized by over 200 years of research and is supported by a growing arsenal of molecular tools. The anatomical and evolutionary closeness of the salamander and human limb also add value from a translational and therapeutic standpoint. Tracing the evolutionary origins of the salamander blastema, and its relatedness to other regenerative processes throughout the animal kingdom, will both enhance our basic biological understanding of regeneration and inform our selection of regenerative model systems.
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Affiliation(s)
| | | | - Jessica L. Whited
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, United States
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Simpson LA, Crowley D, Forey T, Acosta H, Ferjentsik Z, Chatfield J, Payne A, Simpson BS, Redwood C, Dixon JE, Holmes N, Sang F, Alberio R, Loose M, Johnson AD. NANOG is required to establish the competence for germ-layer differentiation in the basal tetrapod axolotl. PLoS Biol 2023; 21:e3002121. [PMID: 37315073 PMCID: PMC10599592 DOI: 10.1371/journal.pbio.3002121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 10/25/2023] [Accepted: 04/13/2023] [Indexed: 06/16/2023] Open
Abstract
Pluripotency defines the unlimited potential of individual cells of vertebrate embryos, from which all adult somatic cells and germ cells are derived. Understanding how the programming of pluripotency evolved has been obscured in part by a lack of data from lower vertebrates; in model systems such as frogs and zebrafish, the function of the pluripotency genes NANOG and POU5F1 have diverged. Here, we investigated how the axolotl ortholog of NANOG programs pluripotency during development. Axolotl NANOG is absolutely required for gastrulation and germ-layer commitment. We show that in axolotl primitive ectoderm (animal caps; ACs) NANOG and NODAL activity, as well as the epigenetic modifying enzyme DPY30, are required for the mass deposition of H3K4me3 in pluripotent chromatin. We also demonstrate that all 3 protein activities are required for ACs to establish the competency to differentiate toward mesoderm. Our results suggest the ancient function of NANOG may be establishing the competence for lineage differentiation in early cells. These observations provide insights into embryonic development in the tetrapod ancestor from which terrestrial vertebrates evolved.
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Affiliation(s)
- Luke A. Simpson
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - Darren Crowley
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - Teri Forey
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - Helena Acosta
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - Zoltan Ferjentsik
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - Jodie Chatfield
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - Alexander Payne
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - Benjamin S. Simpson
- Tumour Immunogenomics and Immunosurveillance Laboratory, University College London Cancer Institute, London, United Kingdom
- Cancer Dynamics Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Catherine Redwood
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - James E. Dixon
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - Nadine Holmes
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - Fei Sang
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - Ramiro Alberio
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, United Kingdom
| | - Matthew Loose
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
| | - Andrew D. Johnson
- School of Life Sciences, University of Nottingham, Queens Medical Centre, Nottingham, United Kingdom
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7
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Wang Y, Liu C, Qiao X, Han X, Liu ZP. PKI: A bioinformatics method of quantifying the importance of nodes in gene regulatory network via a pseudo knockout index. BIOCHIMICA ET BIOPHYSICA ACTA. GENE REGULATORY MECHANISMS 2023; 1866:194911. [PMID: 36804477 DOI: 10.1016/j.bbagrm.2023.194911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 01/09/2023] [Accepted: 01/30/2023] [Indexed: 02/18/2023]
Abstract
BACKGROUND Gene regulatory network (GRN) is a model that characterizes the complex relationships between genes and thereby provides an informatics environment to measure the importance of nodes. The evaluation of important nodes in a GRN can effectively refer to their functional implications severing as key players in particular biological processes, such as master regulator and driver gene. Currently, it is mainly based on network topological parameters and focuses only on evaluating a single node individually. However, genes and products play their functions by interacting with each other. It is worth noting that the effects of gene combinations in GRN are not simply additive. Key combinations discovery is of significance in revealing gene sets with important functions. Recently, with the development of single-cell RNA-sequencing (scRNA-seq) technology, we can quantify gene expression profiles of individual cells that provide the potential to identify crucial nodes in gene regulations regarding specific condition, e.g., stem cell differentiation. RESULTS In this paper, we propose a bioinformatics method, called Pseudo Knockout Importance (PKI), to quantify the importance of node and node sets in a specific GRN structure using time-course scRNA-seq data. First, we construct ordinary differential equations to approach the gene regulations during cell differentiation. Then we design gene pseudo knockout experiments and define PKI score evaluation criteria based on the coefficient of determination. The importance of nodes can be described as the influence on the ODE system of removing variables. For key gene combinations, PKI is derived as a combinatorial optimization problem of quantifying the in silico gene knockout effects. CONCLUSIONS Here, we focus our analyses on the specific GRN of embryonic stem cells with time series gene expression profile. To verify the effectiveness and advantage of PKI method, we compare its node importance rankings with other twelve kinds of centrality-based methods, such as degree and Latora closeness. For key node combinations, we compare the results with the method based on minimum dominant set. Moreover, the famous combinations of transcription factors in induced pluripotent stem cell are also employed to verify the vital gene combinations identified by PKI. These results demonstrate the reliability and superiority of the proposed method.
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Affiliation(s)
- Yijuan Wang
- Department of Biomedical Engineering, School of Control Science and Engineering, Shandong University, Jinan, Shandong 250061, China
| | - Chao Liu
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Xu Qiao
- Department of Biomedical Engineering, School of Control Science and Engineering, Shandong University, Jinan, Shandong 250061, China
| | - Xianhua Han
- Faculty of Science, Yamaguchi University, Yamaguchi 753-8511, Japan
| | - Zhi-Ping Liu
- Department of Biomedical Engineering, School of Control Science and Engineering, Shandong University, Jinan, Shandong 250061, China.
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8
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Tan DS, Cheung SL, Gao Y, Weinbuch M, Hu H, Shi L, Ti SC, Hutchins AP, Cojocaru V, Jauch R. The homeodomain of Oct4 is a dimeric binder of methylated CpG elements. Nucleic Acids Res 2023; 51:1120-1138. [PMID: 36631980 PMCID: PMC9943670 DOI: 10.1093/nar/gkac1262] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 12/14/2022] [Accepted: 12/19/2022] [Indexed: 01/13/2023] Open
Abstract
Oct4 is essential to maintain pluripotency and has a pivotal role in establishing the germline. Its DNA-binding POU domain was recently found to bind motifs with methylated CpG elements normally associated with epigenetic silencing. However, the mode of binding and the consequences of this capability has remained unclear. Here, we show that Oct4 binds to a compact palindromic DNA element with a methylated CpG core (CpGpal) in alternative states of pluripotency and during cellular reprogramming towards induced pluripotent stem cells (iPSCs). During cellular reprogramming, typical Oct4 bound enhancers are uniformly demethylated, with the prominent exception of the CpGpal sites where DNA methylation is often maintained. We demonstrate that Oct4 cooperatively binds the CpGpal element as a homodimer, which contrasts with the ectoderm-expressed POU factor Brn2. Indeed, binding to CpGpal is Oct4-specific as other POU factors expressed in somatic cells avoid this element. Binding assays combined with structural analyses and molecular dynamic simulations show that dimeric Oct4-binding to CpGpal is driven by the POU-homeodomain whilst the POU-specific domain is detached from DNA. Collectively, we report that Oct4 exerts parts of its regulatory function in the context of methylated DNA through a DNA recognition mechanism that solely relies on its homeodomain.
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Affiliation(s)
- Daisylyn Senna Tan
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Shun Lai Cheung
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Ya Gao
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Maike Weinbuch
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China,Institute for Molecular Medicine, Ulm University, Ulm, Germany
| | - Haoqing Hu
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Liyang Shi
- Shenzhen Key Laboratory of Gene Regulation and Systems Biology, Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen 518055, China
| | - Shih-Chieh Ti
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Andrew P Hutchins
- Shenzhen Key Laboratory of Gene Regulation and Systems Biology, Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen 518055, China
| | - Vlad Cojocaru
- STAR-UBB Institute, Babeş-Bolyai University, Cluj-Napoca, Romania,Computational Structural Biology Group, Utrecht University, The Netherlands,Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Ralf Jauch
- To whom correspondence should be addressed. Tel: +852 3917 9511; Fax: +852 28559730;
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9
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Bakhmet EI, Tomilin AN. Correction to: ‘The functional diversity of the POUV-class proteins across vertebrates’ (2022) by Bakhmet and Tomilin. Open Biol 2022; 12:220306. [DOI: 10.1098/rsob.220306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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