Fibroin

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fibroin

[′fī·brə·wən]

(biochemistry)

A protein secreted by spiders and silkworms which rapidly solidifies into strong, insoluble thread that is used to form webs or cocoons.

Fibroin

a simple protein, the principal component of the natural silk and spider-silk fibers secreted by the silk-secreting glands of certain insects and the silk glands of spiders and other arthropods. Fibroin is a viscous, syrupy fluid, that hardens in the air to a tough, insoluble filament. Fibroin threads, coated with the protein sericin, form a silk fiber, as in silkworm cocoons.

Fibroin belongs to a group of structural proteins called scleroproteins. It is resistant to organic solvents, dilute acids and bases, and proteolytic enzymes. The fibroin molecule consists of an elongated polypeptide chain_o with repeating structural units, measuring approximately 7 Å. The group of amino acids in fibroin includes a high content of glycine (43 percent), alanine, serine, and tyrosine. The content of the amino acid tyrosine in fibroin is so much higher than in other proteins that fibroin is usually used as the prime source for obtaining tyrosine.

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References in periodicals archive ?

Natural silk is a protein polymer consisting of two proteins: fibroin and sericin.

GENERATION OF SILK FIBROIN-CA-P COMPOSITE BIOMIMETIC BONE REPLACEMENT MATERIAL USING ELECTROCHEMICAL DEPOSITION

An important source of fibroin is the cocoon of the silkworm (Bombyx mori), which is found in high proportion in Colombia and whose production area is about 400 thousand hectares in the departments of Caldas, Quindio, Risaralda and northern Valle del Cauca (Mesa & Millan, 2008).

Obtencion y caracterizacion de andamios electrohilados a base de quitosano y fibroina del capullo (Bombyx mori)

Grafts in myringoplasty: utilizing a silk fibroin scaffold as a novel device.

Closure of small central perforations of tympanic membrane with Gelfilm patch and application of Platelet Rich Plasma versus chemical cauterization: a comparative study

The extracted fibroin was dissolved in molten Ca[(N[O.

Preparation of Antheraea pernyi silk fibroin microparticles through a facile electrospinning method

The physical structure of the blends were maintained after immersing in water for a period of time, shows that the blends were insoluble in water as compared to silk fibroin, which shows its solubility in water.

Blending strategies of natural polymers: a review

Keywords Silk fibroin, Microencapsulation, Coatings, Stabilization, Emulsion, Controlled release

Encapsulation of volatile compounds in silk microparticles

Silk fibroin is a natural polymer produced by various insects.

Tissue Engineering Scaffolds Produced from Natural Silk in Iran

Cerapedics added that the new product includes silk from larva of the bombyx mori moth that is purified to remove the protein sericin, resulting in biocompatible fibroin fibers that enhance cohesion and mechanical properties.

Cerapedics Biologic Bone Graft Receives CE Mark

Among the other materials that are undergoing development in research institutions across the world is 'shrilk' which is incredibly strong and flexible but which because it is made of a combination of the organic polymer chitin (it is found in insect exoskeletons) and fibroin (the insoluble protein in spider silk), is biodegradable.

Innovate or die - but will our bosses take the risk or spend the cash?

Mathur, In vivo bone formation in silk fibroin and chitosan.

GNAS complex group support bone regeneration in vivo model

Available colours are Metallic Matt Fibroin Grey and Brilliant White.

plugs points &

The implants are made of a protein called fibroin, which is extracted from sirk.