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Martin F. Flajnik
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Journal Articles

An Ancient MHC-Linked Gene Encodes a Nonrearranging Shark Antibody, UrIg, Convergent with IgG

Martin F. Flajnik, Robyn Stanfield, Elena N. Pokidysheva, Sergei P. Boudko, Ian Wilson, Yuko Ohta
Journal: The Journal of Immunology
J Immunol (2023) 211 (6): 1042–1051.
https://doi.org/10.4049/jimmunol.2300361
Published: 04 August 2023
View article titled, An Ancient MHC-Linked Gene Encodes a Nonrearranging Shark Antibody, UrIg, Convergent with IgG
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Includes: Supplementary data
Journal Articles

A Highly Complex, MHC-Linked, 350 Million-Year-Old Shark Nonclassical Class I Lineage

Tereza Almeida, Yuko Ohta, Arnaud Gaigher, Antonio Muñoz-Mérida, Fabiana Neves, L. Filipe C. Castro, André M. Machado, Pedro J. Esteves, Ana Veríssimo, Martin F. Flajnik
Journal: The Journal of Immunology
J Immunol (2021) 207 (3): 824–836.
https://doi.org/10.4049/jimmunol.2000851
Published: 01 August 2021
View article titled, A Highly Complex, MHC-Linked, 350 Million-Year-Old Shark Nonclassical Class I Lineage
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Journal Articles

An Ancient, MHC-Linked, Nonclassical Class I Lineage in Cartilaginous Fish

Tereza Almeida, Pedro J. Esteves, Martin F. Flajnik, Yuko Ohta, Ana Veríssimo
Journal: The Journal of Immunology
J Immunol (2020) 204 (4): 892–902.
https://doi.org/10.4049/jimmunol.1901025
Published: 15 February 2020
View article titled, An Ancient, MHC-Linked, Nonclassical Class I Lineage in Cartilaginous Fish
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Includes: Supplementary data
Journal Articles

Inferring the “Primordial Immune Complex”: Origins of MHC Class I and Antigen Receptors Revealed by Comparative Genomics

Yuko Ohta, Masanori Kasahara, Timothy D. O’Connor, Martin F. Flajnik
Journal: The Journal of Immunology
J Immunol (2019) 203 (7): 1882–1896.
https://doi.org/10.4049/jimmunol.1900597
Published: 01 October 2019
View article titled, Inferring the “Primordial Immune Complex”: Origins of MHC Class I and Antigen Receptors Revealed by Comparative Genomics
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Includes: Supplementary data
Journal Articles

Ancient Use of Ig Variable Domains Contributes Significantly to the TCRδ Repertoire

Thaddeus C. Deiss, Breanna Breaux, Jeannine A. Ott, Rebecca A. Daniel, Patricia L. Chen, Caitlin D. Castro, Yuko Ohta, Martin F. Flajnik, Michael F. Criscitiello
Journal: The Journal of Immunology
J Immunol (2019) 203 (5): 1265–1275.
https://doi.org/10.4049/jimmunol.1900369
Published: 01 September 2019
View article titled, Ancient Use of Ig Variable Domains Contributes Significantly to the TCRδ Repertoire
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Includes: Supplementary data
Journal Articles

Somatic hypermutation of T cell receptor gamma, delta, and beta chains in nurse sharks

Jeannine A Ott, Jenna Harrison, Yuko Ota, Martin F Flajnik, Michael F Criscitiello
Journal: The Journal of Immunology
J Immunol (2019) 202 (1_Supplement): 73.3.
https://doi.org/10.4049/jimmunol.202.Supp.73.3
Published: 01 May 2019
View article titled, Somatic hypermutation of T cell receptor gamma, delta, and beta chains in nurse sharks
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Journal Articles

Haptoglobin Is a Divergent MASP Family Member That Neofunctionalized To Recycle Hemoglobin via CD163 in Mammals

Anthony K. Redmond, Yuko Ohta, Michael F. Criscitiello, Daniel J. Macqueen, Martin F. Flajnik, Helen Dooley
Journal: The Journal of Immunology
J Immunol (2018) 201 (8): 2483–2491.
https://doi.org/10.4049/jimmunol.1800508
Published: 15 October 2018
View article titled, Haptoglobin Is a Divergent MASP Family Member That Neofunctionalized To Recycle Hemoglobin via CD163 in Mammals
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Includes: Supplementary data
Journal Articles

A Convergent Immunological Holy Trinity of Adaptive Immunity in Lampreys: Discovery of the Variable Lymphocyte Receptors

In Special Collection:
Pillars of Immunology
Martin F. Flajnik
Journal: The Journal of Immunology
J Immunol (2018) 201 (5): 1331–1335.
https://doi.org/10.4049/jimmunol.1800965
Published: 01 September 2018
View article titled, A Convergent Immunological Holy Trinity of Adaptive Immunity in Lampreys: Discovery of the Variable Lymphocyte Receptors
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Journal Articles

Somatic hypermutation of TCRα contributes to thymic positive selection in sharks

Jeannine A. Ott, Caitlin Castro, Thaddeus Deiss, Yuko Ota, Martin F. Flajnik, Michael F. Criscitiello
Journal: The Journal of Immunology
J Immunol (2018) 200 (1_Supplement): 59.8.
https://doi.org/10.4049/jimmunol.200.Supp.59.8
Published: 01 May 2018
View article titled, Somatic hypermutation of TCRα contributes to thymic positive selection in sharks
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Journal Articles

Dissecting the polyclonal antibody response of nurse sharks (Ginglymostoma cirratum) to immunization with influenza A virus suggests different roles for IgNAR and IgM, but a common immunodominance hierarchy with hemagglutinin on top

Meghan O Altman, Davide Angeletti, Jonathon W Yewdell, Martin F Flajnik
Journal: The Journal of Immunology
J Immunol (2017) 198 (1_Supplement): 122.8.
https://doi.org/10.4049/jimmunol.198.Supp.122.8
Published: 01 May 2017
View article titled, Dissecting the polyclonal antibody response of nurse sharks (Ginglymostoma cirratum) to immunization with influenza A virus suggests different roles for IgNAR and IgM, but a common immunodominance hierarchy with hemagglutinin on top
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Journal Articles

CXCL13 Responsiveness but Not CXCR5 Expression by Late Transitional B Cells Initiates Splenic White Pulp Formation

Harold R. Neely, Martin F. Flajnik
Journal: The Journal of Immunology
J Immunol (2015) 194 (6): 2616–2623.
https://doi.org/10.4049/jimmunol.1401905
Published: 15 March 2015
View article titled, CXCL13 Responsiveness but Not CXCR5 Expression by Late Transitional B Cells Initiates Splenic White Pulp Formation
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Journal Articles

Putting J Chain Back on the Map: How Might Its Expression Define Plasma Cell Development?

In Special Collection:
Brief Reviews
Caitlin D. Castro, Martin F. Flajnik
Journal: The Journal of Immunology
J Immunol (2014) 193 (7): 3248–3255.
https://doi.org/10.4049/jimmunol.1400531
Published: 01 October 2014
View article titled, Putting J Chain Back on the Map: How Might Its Expression Define Plasma Cell Development?
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Journal Articles

The Multiple Shark Ig H Chain Genes Rearrange and Hypermutate Autonomously

Catherine Zhu, Wendy Feng, Jeremy Weedon, Pauline Hua, Dimitre Stefanov, Yuko Ohta, Martin F. Flajnik, Ellen Hsu
Journal: The Journal of Immunology
J Immunol (2011) 187 (5): 2492–2501.
https://doi.org/10.4049/jimmunol.1101671
Published: 01 September 2011
View article titled, The Multiple Shark Ig H Chain Genes Rearrange and Hypermutate Autonomously
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Includes: Supplementary data
Journal Articles

Primordial Linkage of β2-Microglobulin to the MHC

Yuko Ohta, Takashi Shiina, Rebecca L. Lohr, Kazuyoshi Hosomichi, Toni I. Pollin, Edward J. Heist, Shingo Suzuki, Hidetoshi Inoko, Martin F. Flajnik
Journal: The Journal of Immunology
J Immunol (2011) 186 (6): 3563–3571.
https://doi.org/10.4049/jimmunol.1003933
Published: 15 March 2011
View article titled, Primordial Linkage of <em>β2-Microglobulin</em> to the MHC
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Includes: Supplementary data
Journal Articles

Evolutionarily Conserved TCR Binding Sites, Identification of T Cells in Primary Lymphoid Tissues, and Surprising Trans-Rearrangements in Nurse Shark

Michael F. Criscitiello, Yuko Ohta, Mark Saltis, E. Churchill McKinney, Martin F. Flajnik
Journal: The Journal of Immunology
J Immunol (2010) 184 (12): 6950–6960.
https://doi.org/10.4049/jimmunol.0902774
Published: 15 June 2010
View article titled, Evolutionarily Conserved TCR Binding Sites, Identification of T Cells in Primary Lymphoid Tissues, and Surprising Trans-Rearrangements in Nurse Shark
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Includes: Supplementary data
Journal Articles

Ancestral Organization of the MHC Revealed in the Amphibian Xenopus

Yuko Ohta, Wilfried Goetz, M. Zulfiquer Hossain, Masaru Nonaka, Martin F. Flajnik
Journal: The Journal of Immunology
J Immunol (2006) 176 (6): 3674–3685.
https://doi.org/10.4049/jimmunol.176.6.3674
Published: 15 March 2006
View article titled, Ancestral Organization of the MHC Revealed in the Amphibian <em>Xenopus</em>
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Journal Articles

Somatic Hypermutation and Junctional Diversification at Ig Heavy Chain Loci in the Nurse Shark

Karolina Malecek, Julie Brandman, Jennie E. Brodsky, Yuko Ohta, Martin F. Flajnik, Ellen Hsu
Journal: The Journal of Immunology
J Immunol (2005) 175 (12): 8105–8115.
https://doi.org/10.4049/jimmunol.175.12.8105
Published: 15 December 2005
View article titled, Somatic Hypermutation and Junctional Diversification at Ig Heavy Chain Loci in the Nurse Shark
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Journal Articles

Shark Ig Light Chain Junctions Are as Diverse as in Heavy Chains

Marshall Fleurant, Lily Changchien, Chin-Tung Chen, Martin F. Flajnik, Ellen Hsu
Journal: The Journal of Immunology
J Immunol (2004) 173 (9): 5574–5582.
https://doi.org/10.4049/jimmunol.173.9.5574
Published: 01 November 2004
View article titled, Shark Ig Light Chain Junctions Are as Diverse as in Heavy Chains
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Journal Articles

Homologs of CD83 from Elasmobranch and Teleost Fish

Yuko Ohta, Eric Landis, Thomas Boulay, Ruth B. Phillips, Bertrand Collet, Chris J. Secombes, Martin F. Flajnik, John D. Hansen
Journal: The Journal of Immunology
J Immunol (2004) 173 (7): 4553–4560.
https://doi.org/10.4049/jimmunol.173.7.4553
Published: 01 October 2004
View article titled, Homologs of CD83 from Elasmobranch and Teleost Fish
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Journal Articles

Unprecedented Multiplicity of Ig Transmembrane and Secretory mRNA Forms in the Cartilaginous Fish

Lynn L. Rumfelt, Marilyn Diaz, Rebecca L. Lohr, Evonne Mochon, Martin F. Flajnik
Journal: The Journal of Immunology
J Immunol (2004) 173 (2): 1129–1139.
https://doi.org/10.4049/jimmunol.173.2.1129
Published: 15 July 2004
View article titled, Unprecedented Multiplicity of Ig Transmembrane and Secretory mRNA Forms in the Cartilaginous Fish
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