scholarly journals Histological Observation of the Jaws and Teeth of the Green Spotted Pufferfish (Tetraodon Nigroviridis)

2015 ◽  
Vol 24 (4) ◽  
pp. 325-330
Author(s):  
Yuzo Hirayama ◽  
Tae Watanabe ◽  
Megumi Yokoyama ◽  
Motoya Fujiseki ◽  
Takaki Yamazaki ◽  
...  
Keyword(s):  
Histological Observation ◽  
Tetraodon Nigroviridis

Subfunctionalization of Duplicate mitf Genes Associated With Differential Degeneration of Alternative Exons in Fish

Genetics ◽  
2002 ◽  
Vol 161 (1) ◽  
pp. 259-267 ◽  
Author(s):  
Joachim Altschmied ◽  
Jacqueline Delfgaauw ◽  
Brigitta Wilde ◽  
Jutta Duschl ◽  
Laurence Bouneau ◽  
...  
Keyword(s):  
Danio Rerio ◽  
Evolutionary History ◽  
Single Gene ◽  
Regulatory Elements ◽  
Fugu Rubripes ◽  
Gene Encoding ◽  
Tetraodon Nigroviridis ◽  
Mammalian Lineage ◽  
History Of ◽  
Fish Proteins

Abstract The microphthalmia-associated transcription factor (MITF) exists in at least four isoforms. These are generated in higher vertebrates using alternative 5′ exons and promoters from a single gene. Two separate genes (mitf-m and mitf-b), however, are present in different teleost fish species including the poeciliid Xiphophorus, the pufferfishes Fugu rubripes and Tetraodon nigroviridis, and the zebrafish Danio rerio. Fish proteins MITF-m and MITF-b correspond at both the structural and the expression levels to one particular bird/mammalian MITF isoform. In the teleost lineage subfunctionalization of mitf genes after duplication at least 100 million years ago is associated with the degeneration of alternative exons and, probably, regulatory elements and promoters. For example, a remnant of the first exon specific for MITF-m is detected within the pufferfish gene encoding MITF-b. Retracing the evolutionary history of mitf genes in vertebrates uncovered the differential recruitment of new introns specific for either the teleost or the bird/mammalian lineage.

scholarly journals The Effect of Aging/Freezing Sequence and Freezing Rate on Quality Attributes of Beef Loins (M. longissimus lumborum)

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Derico Setyabrata ◽  
Jacob R. Tuell ◽  
Brad Kim
Keyword(s):  
Shear Force ◽  
Troponin T ◽  
Quality Attributes ◽  
Freezing Rate ◽  
Histological Observation ◽  
Ice Crystal ◽  
Lower Shear ◽  
Beef Carcasses ◽  
Longissimus Lumborum ◽  
Fast Freezing

The objective of this study was to determine the effect of different aging/freezing sequences combined with different freezing rates on quality attributes of beef loins (M. longissimus lumborum). Loins from 1 side of 8 beef carcasses (USDA Low Choice grade) were obtained at 2 d postmortem, cut into 10 steaks (2.54 cm), and randomly assigned into 5 treatments, where factorial combinations of 2 aging/freezing sequences (aging first then freezing/thawing [AFT] and freezing first then thawing/aging [FTA]) and 2 freezing rates (fast freezing [FF] and slow freezing [SF]) were used and compared to an aged only (AO) treatment as a control. Samples frozen using the FF condition were found to have a critical freezing time (Tc) of 21.5 min while the SF counterpart had a Tc of 175 min. Histological observation showed more visually enlarged gaps between muscle fibers in the SF samples, regardless of aging/freezing sequence. The SF-FTA samples had a significantly higher purge/ thaw loss followed by FF-FTA, while the loss from FF-AFT, SF-AFT, and AO were not different from each other (P > 0.05), suggesting that freezing rate effect might be more profound when applied in FTA. Cook loss was higher in AO compared to both FTA treatments (P < 0.05); however, it was not different when compared to AFT (P > 0.05). A lower shear force value and higher troponin-T protein degradation were found in both AFT and FTA compared to AO (P < 0.05), which would be attributed to the ice-crystal damage due to freezing. These results suggest that aging/freezing sequence could be an overriding factor in determining major meat quality attributes of frozen/thawed meat over freezing rate. However, fast freezing could negate some quality defects associated with the FTA process.

Histological Observation of the Proper Gastric Gland in Minke Whale, Balaenoptera acutorostrata

2003 ◽  
Vol 65 (3) ◽  
pp. 423-426 ◽  
Author(s):  
Tetsuya SHIMOKAWA ◽  
Daishiro YAMAGIWA ◽  
Eiichi HONDO ◽  
Shigetoshi NISHIWAKI ◽  
Yasuo KISO ◽  
...  
Keyword(s):  
Gastric Gland ◽  
Minke Whale ◽  
Histological Observation ◽  
Balaenoptera Acutorostrata

Global heterochromatic colocalization of transposable elements with minisatellites in the compact genome of the pufferfish Tetraodon nigroviridis

Gene ◽  
2004 ◽  
Vol 336 (2) ◽  
pp. 175-183 ◽  
Author(s):  
Cécile Fischer ◽  
Laurence Bouneau ◽  
Jean-Pierre Coutanceau ◽  
Jean Weissenbach ◽  
Jean-Nicolas Volff ◽  
...  
Keyword(s):  
Transposable Elements ◽  
Tetraodon Nigroviridis

Estimate of human gene number provided by genome-wide analysis using Tetraodon nigroviridis DNA sequence

10.1038/76118 ◽  
2000 ◽  
Vol 25 (2) ◽  
pp. 235-238 ◽  
Author(s):  
Hugues Roest Crollius ◽  
Olivier Jaillon ◽  
Alain Bernot ◽  
Corinne Dasilva ◽  
Laurence Bouneau ◽  
...  
Keyword(s):  
Dna Sequence ◽  
Human Gene ◽  
Gene Number ◽  
Genome Wide Analysis ◽  
Genome Wide ◽  
Tetraodon Nigroviridis
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