Molluscs

Aquaculture, also known as aquafarming, is the farming of aquatic organisms such as fish, crustaceans, molluscs and aquatic plants.[1][2] Aquaculture involves cultivating freshwater and saltwater populations under controlled conditions, and can be contrasted with commercial fishing, which is the harvesting of wild fish.[3] Mariculture refers to aquaculture practiced in marine environments and in underwater habitats.

31p ltanh04 25-05-2010 259 106   Download

The transport of oxygen in the hemolymph of many arth-ropod and mollusc species is mediated by large copper-proteins that are referred to as hemocyanins. Arthropod hemocyanins are composed of hexamers and oligomers of hexamers. Arachnid hemocyanins usually form 4·6-mers consisting of seven distinct subunit types (termed a–g), although in some spider taxa deviations from this standard scheme have been observed.

8p tumor12 20-04-2013 39 4   Download

Cone snails comprise
500 species of venomous molluscs, which have evolved the ability to generate multiple toxins with varied and often exquisite selectivity. One class, the a-conotoxins, is proving to be a powerful tool for the differentiation of nicotinic acetylcholine receptors (nAChRs). These comprise a large family of complex subtypes, whose significance in physiological functions and pathological conditions is increasingly becoming apparent.

15p dell39 03-04-2013 47 4   Download

Chitinase-like proteins have been identified in insects and mammals as non-enzymatic members of the glycoside hydrolase family 18. Recently, the first molluscan chitinase-like protein, namedCrassostrea gigas(Cg)-Clp1, was shown to control the proliferation and synthesis of extracellular matrix components of mammalian chondrocytes.

9p galaxyss3 19-03-2013 46 4   Download

Among molluscs, the shell biomineralization process is controlled by a set of extracellular macromolecular components secreted by the calcifying mantle. In spite of several studies, these components are mainly known in bivalves from only few members of pteriomorph groups.

13p galaxyss3 19-03-2013 42 3   Download

Several isoforms of the cAMP-dependent protein kinase catalytic subunit (C-subunit) were separated from the posterior adductor muscle and the mantle tissues of the sea mussel Mytilus galloprovincialisby cation exchange chromatography, and identified by: (a) protein kinase activity; (b) antibody recognition;

11p galaxyss3 07-03-2013 44 5   Download

The thermal stability of the eight functional units ofb-hemocyanin of the gastropodan mollusc Helix pomatiawas investigated by FTIR spectros-copy. Molluscan hemocyanin functional units have a molecular mass of approximately 50 kDa and generally contain three disulfide bridges: two in the mainly a-helical N-terminal domain and one in the C-terminal b-sheet domain.

8p galaxyss3 07-03-2013 37 3   Download

This study investigated the potential of RNA interference, which is techni-cally challenging in bivalve mollusc species, to assess gene function in the oysterCrassostrea gigas. We designed dsRNA targeting the oyster vasa-like gene (Oyvlg), specifically expressed in oyster germ cells. In vivoinjection of oyvl-dsRNA into the gonad provokes a knockdown phenotype correspond-ing to germ cell underproliferation and prematurely arrested meiosis throu-gout the organ.

8p viettel02 22-02-2013 32 2   Download

In molluscs, and more generally in metazoan organisms, the production of a calcified skeleton is a complex molecular process that is regulated by the secretion of an extracellular organic matrix. This matrix constitutes a cohe-sive and functional macromolecular assemblage, containing mainly pro-teins, glycoproteins and polysaccharides that, together, control the biomineral formation.

14p cosis54 05-01-2013 58 3   Download

Commonly referred to as bivalves, are the class of marine and freshwater molluscs with laterally compressed bodies enclosed by a shell in two hinged parts. They include clams, oysters, mussels, scallops, and numerous other families

13p huynhtancuong_260892 18-12-2012 56 2   Download

The cystine-knot motif, made up of three intertwined disulfide bridges, is a unique feature of several toxins, cyclotides and growth factors, and occurs in a variety of species, including fungi, insects, molluscs and mammals. Growth factor molecules containing the cystine-knot motif serve as ligands for a diverse range of receptors and play an important role in extracellular signalling.

19p cosis54 09-12-2012 56 3   Download