DUPONT once had an advert in CE&N showing a suspension bridge made of spider silk and a text claiming that a single cable of silk could hold back a jet. The US army dreamed of making lightweight bulletproof alternatives to Kevlar. At an earlier point in my own life I was engaged in an effort to clone the spider silk gene. Recently, recombinant and functional spider silk has been reported, along with heterologous host systems, but scale-up remains a considerable challenge.
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