Biomaterial Database

Histochemical studies of oxidoreductases, acid carbohydrates and glycoproteins in the epidermis of the electric eel Electrophorus electricus. 1984

G Zaccone

The activities of various oxidative enzymes and the presence of acid carbohydrates and acid glycoproteins in the epithelial cells and the mucous goblet cells of the epidermis of the Teleost Electrophorus electricus have been determined by means of a series of selected histochemical techniques of light microscopy. The enzyme activities show a distribution pattern confined mainly to basal cell layers and outer cell layers with a comparatively lower gradient in the transitional cell layers. A mixture of sialic acids of both N-acylated and O-acylated types is found in the mucous goblet cells and the functional significance of mucous production is related to the first line of defense against pathogenic colonization. The higher incidence of various oxidoreductases distributed throughout the entire epidermis is correlated with their key role which can play in the processes of cell differentiation and cell multiplication except for those regarding keratin formation which is not produced in the epidermis of most fish.

UI	MeSH Term	Description	Entries
D009093	Mucus	The viscous secretion of mucous membranes. It contains mucin, white blood cells, water, inorganic salts, and exfoliated cells.
D010088	Oxidoreductases	The class of all enzymes catalyzing oxidoreduction reactions. The substrate that is oxidized is regarded as a hydrogen donor. The systematic name is based on donor:acceptor oxidoreductase. The recommended name will be dehydrogenase, wherever this is possible; as an alternative, reductase can be used. Oxidase is only used in cases where O2 is the acceptor. (Enzyme Nomenclature, 1992, p9)	Dehydrogenases,Oxidases,Oxidoreductase,Reductases,Dehydrogenase,Oxidase,Reductase
D002241	Carbohydrates	A class of organic compounds composed of carbon, hydrogen, and oxygen in a ratio of Cn(H2O)n. The largest class of organic compounds, including STARCH; GLYCOGEN; CELLULOSE; POLYSACCHARIDES; and simple MONOSACCHARIDES.	Carbohydrate
D004524	Eels	Common name for an order (Anguilliformes) of voracious, elongate, snakelike teleost fishes.	Anguilliformes,Eel
D004817	Epidermis	The external, nonvascular layer of the skin. It is made up, from within outward, of five layers of EPITHELIUM: (1) basal layer (stratum basale epidermidis); (2) spinous layer (stratum spinosum epidermidis); (3) granular layer (stratum granulosum epidermidis); (4) clear layer (stratum lucidum epidermidis); and (5) horny layer (stratum corneum epidermidis).
D006023	Glycoproteins	Conjugated protein-carbohydrate compounds including MUCINS; mucoid, and AMYLOID glycoproteins.	C-Glycosylated Proteins,Glycosylated Protein,Glycosylated Proteins,N-Glycosylated Proteins,O-Glycosylated Proteins,Glycoprotein,Neoglycoproteins,Protein, Glycosylated,Proteins, C-Glycosylated,Proteins, Glycosylated,Proteins, N-Glycosylated,Proteins, O-Glycosylated
D006651	Histocytochemistry	Study of intracellular distribution of chemicals, reaction sites, enzymes, etc., by means of staining reactions, radioactive isotope uptake, selective metal distribution in electron microscopy, or other methods.	Cytochemistry
D000078404	Epidermal Cells	Cells from the outermost, non-vascular layer (EPIDERMIS) of the skin.	Epidermal Cell,Epidermic Cells,Cell, Epidermal,Cell, Epidermic,Cells, Epidermic,Epidermic Cell
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013194	Staining and Labeling	The marking of biological material with a dye or other reagent for the purpose of identifying and quantitating components of tissues, cells or their extracts.	Histological Labeling,Staining,Histological Labelings,Labeling and Staining,Labeling, Histological,Labelings, Histological,Stainings