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Spidroins are the main proteins in spider silk. Different types of spider silk contain different spidroins, all of which are members of a single protein family. [1] The most-researched type of spidroins are the major ampullate silk proteins (MaSp) used in the construction of dragline silk, the strongest type of spider silk.
Spider silk is a protein fibre or silk spun by spiders. Spiders use silk to make webs or other structures that function as adhesive traps to catch prey, to entangle and restrain prey before biting, to transmit tactile information, or as nests or cocoons to protect their offspring.
Spiders also have several adaptations that distinguish them from other arachnids. All spiders are capable of producing silk of various types, which many species use to build webs to ensnare prey. Most spiders possess venom, which is injected into prey (or defensively, when the spider feels threatened) through the fangs of the chelicerae. Male ...
There are at least six types of silk gland, each producing a different type of silk. [13] Spitting spiders also produce silk in modified venom glands. [41] Silk is mainly composed of a protein very similar to that used in insect silk.
The silk is a complex form of protein fiber that starts off as a protein-rich liquid and then dries into solid filaments, thanks to spinnerets, an external portion of spider glands.
A spinneret is a silk-spinning organ of a spider or the larva of an insect. Some adult insects also have spinnerets, such as those borne on the forelegs of Embioptera. [1] Spinnerets are usually on the underside of a spider's opisthosoma, and are typically segmented. [2] [3] While most spiders have six spinnerets, some have two, four, or eight. [4]
The spidroins that make up all types of spider silk are produced by glands. In orb-weaving spiders, like Araneus ventricosus, there are typically seven or fewer of these glands. The silk proteins created by the glands include flagelliform spidroins, called Flag; tubuliform spidroins, called TuSp; aciniform spidroins, called AcSp; aggregate ...
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related to: spider silk protein function in the body diagram chart