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      Eimeria tenella: cloning of a novel Eimeria tenella cDNA encoding a protein related to rhomboid family from F2 hybrid strain.

      Experimental Parasitology
      Amino Acid Sequence, Animals, Antibodies, Monoclonal, immunology, Base Sequence, Cloning, Molecular, DNA, Complementary, chemistry, genetics, Eimeria tenella, Enzyme-Linked Immunosorbent Assay, Gene Expression Regulation, Gene Library, Immunohistochemistry, Membrane Proteins, Mice, Mice, Inbred BALB C, Molecular Sequence Data, Polymerase Chain Reaction, methods, Protozoan Proteins, RNA, Messenger, metabolism, Serine Endopeptidases

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          Abstract

          A novel cDNA sequence with an open reading frame of 774 bp from Eimeria tenella F2 hybrid strain (ETRH01) was isolated from a lambda cDNA library with a monoclonal antibody against sporozoite. Analysis of the genomic sequence suggests that this is an intronless gene. The deduced protein sequence has 257 amino acids with a calculated molecular weight of 28.349 kDa and an isoelectric point of 8.56. Sequence analysis revealed seven transmembrane domains and a rhomboid domain within the protein. RT-PCR result indicates that this gene was expressed in all of the five E. tenella isolates analyzed. To further study the role of this novel gene in the life cycle of E. tenella, ETRH01 was successfully expressed using pET28b(+) expression system.

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