Seung-Joon Ahn

Seung-Joon Ahn

Assistant Professor

Insect Biochemistry and Molecular Biology

  • Ph.D., Friedrich Schiller University Jena, Germany
  • M.S., Seoul National University, Korea
  • B.S., Seoul National University, Korea

Research Areas:
  • Biochemical and molecular adaptation of insects to xenobiotics
  • Genomic analysis of detoxification gene families in insects
  • CRISPR/Cas9-mediated genome editing in insects
  • G protein-coupled receptors (GPCRs) and their ligands for pest management

Courses Taught:
  • EPP 4154/6154 - General Entomology (Fall)
  • BCH 3901 - Senior Seminar in Biochemistry (Spring, team)
  • BCH 8643 - Molecular Genetics (Fall)
  • BCH/EPP 8363 - Insect Biotechnology (Spring)
  • BCH/EPP 8673 - Host-Microbe Interaction Mechanisms (Spring, team)

Society Membership:
  • Entomological Society of America
  • American Society for Biochemistry and Molecular Biology
  • Mississippi Academy of Sciences

Ahn Lab


  • Gikonyo, M. W., S.-J. Ahn, M. Biondi, F. Fritzlar, Y. Okamura, H. Vogel, T. G. Köllner, I. Şen, D. Hernández-Teixidor, C. -F. Lee, H. Letsch, F. Beran. 2023. A radiation of Psylliodes flea beetles on Brassicaceae is associated with the evolution of specific detoxification enzymes. Evolution qpad197. Download
  • Grant, C., K. Saurabh, A. Hayward, B.J. Hunt, B.J. Troczka, A. Pym, S.-J. Ahn, B. Zeng, C. Gao, A. Leroux, E. Daum, P. Süess, D. Souza, J. Elias, H. Richard, J. Vontas, E. Roditakis, P. Bielza, C.T. Zimmer, C. Bass. 2023. Overexpression of the UDP-glycosyltransferase UGT34A23 confers resistance to the diamide insecticide chlorantraniliprole in the tomato leafminer, Tuta absoluta. Insect Biochemistry and Molecular Biology 159:103983.  Download
  • Isbilir, S., B. Catchot, L. Catchot, F.R. Musser, S.-J. Ahn. 2023. Molecular characterization and expression patterns of a ryanodine receptor in soybean looper, Chrysodeixis includens. Archives of Insect Biochemistry and Physiology 114:e22047. Download
  • Yoon, H. J., B. E. Price, R. K. Parks, S. -J. Ahn, M. -Y. Choi. 2023. Diuretic hormone 31 activates two G protein-coupled receptors with differential second messengers for diuresis in Drosophila suzukii. Insect Biochemistry and Molecular Biology 162:104025. Download
  • Yoon, J.-S., S.-J. Ahn, M.-Y. Choi. 2023. Selection and comparative gene expression of midgut-specific targets for Drosophila suzukii. Insects 14(1):76. Download
  • Yun, S.-H., H.S. Jang, S.-J. Ahn, B.E. Price, D.K. Hasegawa, M.-Y. Choi. 2023. Identification and characterisation of PRXamide peptides in the western flower thrips, Frankliniella occidentalis. Insect Molecular Biology 32:603-614. Download
  • Ahn, S.-J. 2022. Biochemical adaptation of the oriental tobacco budworm, Helicoverpa assulta, to host-plant defensive compounds. Korean Journal of Applied Entomology 61:143-154.  Download
  • Ahn, S.-J., S.J. Marygold, T. Chertemps, M. Maïbèche, S.J. Marygold, T. Van Leeuwen. 2021. Editorial: Invertebrate UDP-Glycosyltransferases: Nomenclature, Diversity and Functions. Frontiers in Physiology 12:748290.  Download
  • Ahn, S.-J., S.J. Marygold. 2021. The UDP-glycosyltransferase family in Drosophila melanogaster: Nomenclature update, gene expression and phylogenetic analysis. Frontiers in Physiology 12:648481.  Download
  • Yoon, J.-S., S.-J. Ahn, C.M. Flinn, M.-Y. Choi. 2021. Identification and functional analysis of dsRNases in spotted-wing drosophila, Drosophila suzukii. Archives of Insect Biochemistry and Physiology 107:e21822.  Download
  • Ahn, S. -J., J. A. Corcoran, R. K. Vander Meer, M. -Y. Choi. 2020. Identification and characterization of GPCRs for pyrokinin and CAPA peptides in the brown marmorated stink bug, Halyomorpha halys (Hemiptera: Pentatomidae). Frontiers in Physiology 11:559. Download
  • Ahn, S. -J., R. J. Mc Donnell, J. A. Corcoran, R. C. Martin, M. -Y. Choi. 2020. Identification and functional characterization of the first molluscan neuromedin U receptor in the slug, Deroceras reticulatum. Scientific Reports 10:22308. Download
  • Ahn, S.-J., H.-W. Oh, J. Corcoran, J.-A. Kim, K.-C. Park, C. G. Park, M.-Y. Choi. 2020. Sex-biased gene expression in antennae of Drosophila suzukii. Archives of Insect Biochemistry and Physiology 104:e21660. Download
  • Israni, B., F. C. Wouters, K. Luck, E. Seibel, S. -J. Ahn, C. Paetz, M. Reinert, H. Vogel, M. Erb, D. G. Heckel, J. Gershenzon, D. G. Vassão. 2020. The fall armyworm Spodoptera frugiperda utilizes specific UDP-Glycosyltransferases to inactivate maize defensive benzoxazinoids. Frontiers in Physiology 11:604754. Download
  • Reich, I., C. Jessie, S. -J. Ahn, M. -Y. Choi, C. Williams, M. Gormally, R. Mc Donnell. 2020. Assessment of the biological control potential of common carabid beetle species for autumn- and winter-active pests (Gastropoda, Lepidoptera, Diptera: Tipulidae) in annual ryegrass in Western Oregon. Insects 11(11):722. Download
  • Ahn, S.-J., F. Betzin, M. W. Gikonyo, Z.-L. Yang, T. G. Köllner, F. Beran. 2019. Identification and evolution of glucosinolate sulfatases in a specialist flea beetle. Scientific Reports 9:15725. Download
  • Ahn, S.-J., K. Donahue, Y. Koh, R. R. Martin, M.-Y. Choi. 2019. Microbial-based double-stranded RNA production to develop cost-effective RNA interference application for insect pest management. International Journal of Insect Science 11:1-8. Download
  • Dou, X., S. Liu, S.-J. Ahn, M.-Y. Choi, R. Jurenka. 2019. Transcriptional comparison between pheromone gland-ovipositor and tarsi in the corn earworm moth Helicoverpa zea. Comparative Biochemistry and Physiology Part D: Genomics and Proteomics 31:100604. Download
  • Garczynski, S. F., C. A. Hendrickson, A. Harper, T. R. Unruh, A. Dhingra, S.-J. Ahn, M. Choi. 2019. Neuropeptides and peptide hormones identified in codling moth, Cydia pomonella (Lepidoptera: Tortricidae). Archives of Insect Biochemistry and Physiology 101(4):e21587.  Download
  • Heidel-Fischer, H. M., R. Kirsch, M. Reichelt, S.-J. Ahn, N. Wielsch, S. W. Baxter, D. G. Heckel, H. Vogel, J. Kroymann. 2019. An insect counteradaptation against host plant defenses evolved through concerted neofunctionalization. Molecular Biology and Evolution 36(6):930-941.  Download
  • Ahn, S.-J., M.-Y. Choi. 2018. Identification and characterization of capa and pyrokinin genes in the brown marmorated stink bug, Halyomorpha halys (Hemiptera): Gene structure, immunocytochemistry, and differential expression. Archives of Insect Biochemistry and Physiology 99(3):e21500.  Download
  • Armisén, D., R. Rajakumar, M. Friedrich, J. B. Benoit, H. M. Robertson, K. A. Panfilio, S.-J. Ahn, M. F. Poelchau, H. Chao, H. Dinh, H. V. Doddapaneni, S. Dugan, R. A. Gibbs, D. S. T. Hughes, Y. Han, S. L. Lee, S. C. Murali, D. M. Muzny, J. Qu, K. C. Worley, M. Munoz-Torres, E. Abouheif, F. Bonneton, T. Chen, L.-M. Chiang, C. P. Childers, A. G. Cridge, Crumière, A. J. J., A. Decaras, E. M. Didion, E. J. Duncan, E. N. Elpidina, Favé, M.-J., C. Finet, C. G. C. Jacobs, A. M. Cheatle Jarvela, E. C. Jennings, J. W. Jones, M. P. Lesoway, M. R. Lovegrove, A. Martynov, B. Oppert, A. Lillico-Ouachour, A. Rajakumar, P. N. Refki, A. J. Rosendale, M. E. Santos, W. Toubiana, M. van der Zee, I. M. Vargas Jentzsch, A. V. Lowman, S. Viala, S. Richards, A. Khila. 2018. The genome of the water strider Gerris buenoi reveals expansions of gene repertoires associated with adaptations to life on the water. BMC Genomics 19(1):832. Download
  • Beran, F., T. Sporer, C. Paetz, S.-J. Ahn, F. Betzin, G. Kunert, A. Shekhov, D. G. Vassão, S. Bartram, S. Lorenz, M. Reichelt, 2018. One pathway is not enough: The cabbage stem flea beetle psylliodes chrysocephala uses multiple strategies to overcome the glucosinolate-myrosinase defense in its host plants. Frontiers in Plant Science 9:1754. Download
  • Walsh, T. K., N. Joussen, K. Tian, A. McGaughran, C.J. Anderson, X. Qiu, S. Ahn, L. Bird, N. Pavlidi, J. Vontas, J. Ryu, A. Rasool, I.B. Macedo, W.T. Tay, Y. Zhang, M.E.A. Whitehouse, P.J. Silvie, S. Downes, L. Nemec, D. G. Heckel. 2018. Multiple recombination events between two cytochrome P450 loci contribute to global pyrethroid resistance in Helicoverpa armigera. PLoS ONE 13(11):e0197760 Download