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Akademický článek

The Non-ureogenic Stinging Catfish, Heteropneustes fossilis, Actively Excretes Ammonia With the Help of Na+/K+-ATPase When Exposed to Environmental Ammonia

Autor: Shit F. Chew, Stephanie Z. L. Tan, Sabrina C. Y. Ip, Caryn Z. Pang, Kum C. Hiong, Yuen K. Ip

Publikováno v: Frontiers in Physiology, Vol 10 (2020)

The stinging catfish, Heteropneustes fossilis, can tolerate high concentrations of environmental ammonia. Previously, it was regarded as ureogenic, having a functional ornithine-urea cycle (OUC) that could be up-regulated during ammonia-loading. Howe

Externí odkaz: https://doaj.org/article/32ef453395924a2598bd222ce2540d46

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Akademický článek

Molecular Characterization of a Dual Domain Carbonic Anhydrase From the Ctenidium of the Giant Clam, Tridacna squamosa, and Its Expression Levels After Light Exposure, Cellular Localization, and Possible Role in the Uptake of Exogenous Inorganic Carbon

Autor: Clarissa Z. Y. Koh, Kum C. Hiong, Celine Y. L. Choo, Mel V. Boo, Wai P. Wong, Shit F. Chew, Mei L. Neo, Yuen K. Ip

Publikováno v: Frontiers in Physiology, Vol 9 (2018)

A Dual-Domain Carbonic Anhydrase (DDCA) had been sequenced and characterized from the ctenidia (gills) of the giant clam, Tridacna squamosa, which lives in symbiosis with zooxanthellae. DDCA was expressed predominantly in the ctenidium. The complete

Externí odkaz: https://doaj.org/article/fd6201c84c2d4c7f91b0ff6e8d05addb

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Akademický článek

Carbonic anhydrase 2‐like in the giant clam, Tridacna squamosa: characterization, localization, response to light, and possible role in the transport of inorganic carbon from the host to its symbionts

Autor: Yuen K. Ip, Clarissa Z. Y. Koh, Kum C. Hiong, Celine Y. L. Choo, Mel V. Boo, Wai P. Wong, Mei L. Neo, Shit F. Chew

Publikováno v: Physiological Reports, Vol 5, Iss 23, Pp n/a-n/a (2017)

Abstract The fluted giant clam, Tridacna squamosa, lives in symbiosis with zooxanthellae which reside extracellularly inside a tubular system. Zooxanthellae fix inorganic carbon (Ci) during insolation and donate photosynthate to the host. Carbonic an

Externí odkaz: https://doaj.org/article/d7344b76f09848a0a382bfa4738f3914

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Akademický článek

The Whitish Inner Mantle of the Giant Clam, Tridacna squamosa, Expresses an Apical Plasma Membrane Ca2+-ATPase (PMCA) Which Displays Light-Dependent Gene and Protein Expressions

Autor: Yuen K. Ip, Kum C. Hiong, Enan J. K. Goh, Mel V. Boo, Celine Y. L. Choo, Biyun Ching, Wai P. Wong, Shit F. Chew

Publikováno v: Frontiers in Physiology, Vol 8 (2017)

Giant clams live in symbiosis with extracellular zooxanthellae and display high rates of growth and shell formation (calcification) in light. Light-enhanced calcification requires an increase in the supply of Ca2+ to, and simultaneously an augmented

Externí odkaz: https://doaj.org/article/d02bfb98dda04b629a36baab6e07b07a

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Akademický článek

The inner mantle of the giant clam, Tridacna squamosa, expresses a basolateral Na+/K+-ATPase α-subunit, which displays light-dependent gene and protein expression along the shell-facing epithelium.

Autor: Mel V Boo, Kum C Hiong, Celine Y L Choo, Anh H Cao-Pham, Wai P Wong, Shit F Chew, Yuen K Ip

Publikováno v: PLoS ONE, Vol 12, Iss 10, p e0186865 (2017)

Na+/K+-ATPase (NKA) is essential for maintaining the Na+ and K+ gradients, and supporting the secondary active transport of certain ions/molecules, across the plasma membrane of animal cells. This study aimed to clone the NKA α-subunit (NKAα) from

Externí odkaz: https://doaj.org/article/5dbffabad8604709af58841d397e26ba

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Akademický článek

Molecular characterization of three Rhesus glycoproteins from the gills of the African lungfish, Protopterus annectens, and effects of aestivation on their mRNA expression levels and protein abundance.

Autor: You R Chng, Jasmine L Y Ong, Biyun Ching, Xiu L Chen, Kum C Hiong, Wai P Wong, Shit F Chew, Siew H Lam, Yuen K Ip

Publikováno v: PLoS ONE, Vol 12, Iss 10, p e0185814 (2017)

African lungfishes are ammonotelic in water. They can aestivate for long periods on land during drought. During aestivation, the gills are covered with dried mucus and ammonia excretion ceases. In fishes, ammonia excretion through the gills involves

Externí odkaz: https://doaj.org/article/0727983be4544eb191ce240a4af6ea3b

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Akademický článek

Possible natural toxins in organic livestock farming

Autor: SEKKIN S, KUM C

Publikováno v: Kafkas Universitesi Veteriner Fakültesi Dergisi, Vol 19, Iss 4, Pp 725-734 (2013)

Public concern about food quality has intensified in recent years. In the last decades, the amount of farmland managed under certified organic practices has expanded dramatically and it is expected to increase in the future. There is a growing demand

Externí odkaz: https://doaj.org/article/fb187867cdbb487cbaa5d4077a46617d

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Akademický článek

Molecular characterization of aquaporin 1 and aquaporin 3 from the gills of the African lungfish, Protopterus annectens, and changes in their branchial mRNA expression levels and protein abundance during three phases of aestivation

Autor: You R. Chng, Jasmine L. Y. Ong, Biyun Ching, Xiu L. Chen, Kum C. Hiong, Wai P. Wong, Shit F. Chew, Siew H. Lam, Yuen K. Ip

Publikováno v: Frontiers in Physiology, Vol 7 (2016)

African lungfishes can undergo long periods of aestivation on land during drought. During aestivation, lungfishes are confronted with desiccation and dehydration, and their gills become non-functional and covered with a thick layer of dried mucus. Aq

Externí odkaz: https://doaj.org/article/e6c5318e8bcd4e5aad133c74f86d4020

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Akademický článek

Voltage-Gated Na+ Channel Isoforms and Their mRNA Expression Levels and Protein Abundance in Three Electric Organs and the Skeletal Muscle of the Electric Eel Electrophorus electricus.

Autor: Biyun Ching, Jia M Woo, Kum C Hiong, Mel V Boo, Wai P Wong, Shit F Chew, Yuen K Ip

Publikováno v: PLoS ONE, Vol 11, Iss 12, p e0167589 (2016)

This study aimed to obtain the coding cDNA sequences of voltage-gated Na+ channel (scn) α-subunit (scna) and β-subunit (scnb) isoforms from, and to quantify their transcript levels in, the main electric organ (EO), Hunter's EO, Sach's EO and the sk

Externí odkaz: https://doaj.org/article/b025aa6e257a47af8cca7d6d5afc9899

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Akademický článek

Light induces changes in activities of Na+/K+(NH4+)-ATPase, H+/K+(NH4+)-ATPase and glutamine synthetase in tissues involved directly or indirectly in light-enhanced calcification in the giant clam Tridacna squamosa

Autor: Alex Y K Ip, Biyun eChing, Kum C. Hiong, Yen Ling eChoo, Mel Veen Boo, WaiP eWong, S F Chew

Publikováno v: Frontiers in Physiology, Vol 6 (2015)

The objective of this study was to determine the effects of 12 h of exposure to light, as compared with 12 h of exposure to darkness (control), on enzymatic activities of transporters involved in the transport of NH4+ or H+, and activities of enzymes

Externí odkaz: https://doaj.org/article/bd584ae071dd48e0ac5fad45b3309cc1

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