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A black widow spider spinning egg case silk.
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Researchers have uncovered the genetic sequence for one of the strongest silks that spiders produce, a discovery that could one day be used to make super spider-silk products for humans.
According to LiveScience, not all spider silk are created equal.
In total, spiders produce approximately seven different types of silk, which they make using special silk glands. The silk threads are spooled out of the external parts of the glands, known as spinnerets. Spiders often have numerous pairs of spinnerets, which they use to produce different types of silk.
In addition to catching and storing food, spiders also use silk for movement and for reproduction.
One of the strongest and most durable types of spider silk is produced only by sexually mature females and is used to construct protective cocoons for their eggs.
“The protein of the egg-case fibers has a different function altogether from that of the other silks,“ said Jessica Garb, a postdoctoral researcher and a co-author on the study.
These properties could also make it ideally suited for human purposes.
In addition to body armor, researchers are also working to develop spider-silk rope and spider-silk micro-sutures for use in surgery.
Using molecular biology lab techniques, Hayashi and Garb uncovered the sequence of molecules called amino acids for a major protein component in egg case silk known as Tusp1. Their finding is important because mechanical properties like the strength, elasticity and durability of a silk is determined by its amino acid sequence, and scientists have been successful in discovering only a handful of such sequences.