The protein encoding zone of Mitochondrial DNA region (inherited from single lineage) seems most suitable and effective for taxonomic, systematic, ecological, evolutionary, DNA barcoding, cryptic species and population studies, exploiting nucleotide/amino acid datasets (1D/2D/3D conformational level). Nowadays, expeditious computerized methods are in trend for analyzing genetic material to demonstrate variations at various levels of protein structures. Structural proteomics have implemented here for genetic identification, differentiation and relationship of species from information rich data of mt COI gene of the family Diplostomidae with inclusion of molecular tools. Various aspects have been utilized herein for re-validation and infallible discrimination of Trematode diplostomoid metacercariae (Tetracotyle lucknowensis Pandey, 1971; T. xenentodoni Chakrabarti, 1970; T. fausti Rai and Pande, 1969; T. muscularius Chakrabarti, 1970 and Diplostomulum minutum Pandey, 1968), the infective stage in the life cycle, causing severe damage to fish host, whose adults are found mainly in fish eating birds and mammals.
Keywords: 3D conformation; Diplostomidae; Hypothetical protein; Insilico; mt DNA COI.
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