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Green fluorescent protein (GFP) has been used to report protein folding by correlating solubility with fluorescence. In a GFP fusion protein, an upstream aggregation-prone domain can disrupt de novo folding of the GFP domain in Escherichia coli, resulting in a loss of fluorescence. Previously, we showed that prevention of misfolding of the upstream aggregation-prone domain by a coupled folding and...
Affinity purification of recombinant proteins has been facilitated by fusion to a modified protein splicing element (intein). The fusion protein expression can be further improved by fusion to a mini-intein, i.e. an intein that lacks an endonuclease domain. We synthesized three mini-inteins using overlapping oligonucleotides to incorporate Escherichia coli optimized codons and allow convenient insertion...
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