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== Applications in Biotechnology ==
== Applications in Biotechnology ==


The dragline silk represents the “toughest biopolymer on Earth” (Tokareva et al., 2013). It also shows other beneficial properties including high tensile strength, elasticity  and biodegradability. That being, dragline fibers can have many uses in medical and industrial fields.


Synthetic silk proteins are commonly produced by recombinant gene expression and gene mimicry (Humenik et al., 2011). They can be spontaneously optimised by altering their form, size and composition. Indeed, DNA sections in silk protein sequence can be rearranged, added to or subtracted from to change the characteristics of the formed protein.
For instance, silk proteins can be processed into many different forms such as fibers, sponges, films, capsules and gels (Kluge et al., 2008; Omenetto and Kaplan, 2010; Spiess et al., 2010). Their biodegradability can also be altered as required to increase or reduce their degradation time. (Doblhofer and Scheibel, 2015; Hardy et al., 2013; Hofer et al., 2012; Lammel et al., 2011).
In this way, the uses for spider silk can give rise to a wide range of novel materials.
As far as the medical field is concerned, spider silk is naturally biocompatibility. This allows its use for applications like drug release materials, cell graft scaffolds, neuron regeneration and cartilage repair 2,3,4. Moreover, the spider silk can also be recombinantly engineered to produce an antimicrobial property, certainly useful is this sector (Gomes et al., 2011).


== References ==
== References ==
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