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The cDNAs of two opsins (Megopsin1 and Megopsin2) from the vetch aphid, Megoura viciae, have been sequenced and encoded for gene products with 378 and 371 amino acid residues, respectively. Phylogenetic analysis reveals that Megopsin1 falls into the insect long-wavelength opsin group and Megopsin2 is a member of the insect UV-wavelength opsins. Both opsins share the key features of G-protein-coupled receptors and the specific motifs of photopigments. In situ hybridization demonstrated that the transcripts of Megopsin1 and Megopsin2 were expressed in the retinula cells of the compound eyes.

Type

Journal article

Journal

Insect Mol Biol

Publication Date

04/2000

Volume

9

Pages

197 - 202

Keywords

Amino Acid Sequence, Animals, Aphids, Cloning, Molecular, Eye, Fabaceae, Genes, Insect, Insect Proteins, Molecular Sequence Data, Plants, Medicinal, Rod Opsins, Sequence Analysis, DNA, Tissue Distribution, Vision, Ocular