Description: sr-spider polypeptide-4 is a single chain recombinant spider protein, produced by fermentation in e. coli. the starting gene is a synthesized copy of the gene from araneus diadematus which codes for dragline silk protein spidroin 1. the protein contains a maximum of 617 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence of the 20 standard amino acids.
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