Major histocompatibility complex class II A gene polymorphism in the striped bass, Morone saxatilis / by Jennifer J. Hardee.

Author/creator Hardee, Jennifer J. author.
Other author McConnell, Thomas J., degree supervisor.
Other author East Carolina University. Department of Biology.
Format Theses and dissertations
Production1994.
Description53 leaves : illustrations ; 28 cm
Supplemental ContentAccess via ScholarShip
Subjects

Summary Polymerase chain reaction (PCR) technology was implemented in the amplification of the major histocompatibility complex (MHC) class II A genes in striped bass {Morone saxatilis). Several PCR reactions were performed on RNA from a Roanoke River striped bass and from a Santee Cooper striped bass. After cloning and sequencing of the PCR products, the sequences were analyzed and compared to the MHC class II A genes of humans, zebrafish, and the nurse shark. This comparison revealed that the PCR products were representative of the entire coding region of the MHC class II A genes. Four different class II A sequences were identified in the Santee Cooper striped bass and three different sequences were identified in the Roanoke River striped bass. These genes all exhibit concentrated variability within the al domain which is the domain involved in forming the peptide binding cleft. The number of different class II A sequences identified in each fish suggests the presence of multiple A gene loci. This observation is supported by Southern blot analysis of genomic DNA from other fish of these same populations. The Roanoke River fish, which are thought to be anadromous, have at least two and maybe as many as four A loci. The Santee Cooper fish which are from a land locked reservoir system are less polymorphic than the Roanoke River fish, however, there is evidence of at least two A loci. Although the striped bass class II A genes are only about 30% similar to mammalian class II A genes, the overall gene organization appears to be conserved among vertebrates. There are four exons that encode for the leader peptide, al domain, al domain, connecting peptide, transmembrane region, and the cytoplasmic tail. The striped bass A sequences are about 50% similar to the zebrafish sequences and 30% similar to the shark.
General noteSubmitted to the faculty of the Department of Biology.
General noteAdvisor: Thomas J. McConnell
Dissertation noteM.S. East Carolina University 1994
Bibliography noteIncludes bibliographical references (leaves 50-53).
Genre/formAcademic theses.
Genre/formAcademic theses.
Genre/formThèses et écrits académiques.

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