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  • Brainly User
2014-08-04T20:45:37+05:30

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Silk fibres are made of a natural protein but they are mainly composed of fibroin.
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2014-08-04T20:46:50+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Silk fibre are made of fibroin.

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