Fusion tags for protein expression
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United States of America Patent
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Mar 20, 2018
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Nov 17, 2016
app pub date -
May 12, 2016
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May 15, 2015
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Abstract
Fluorescent and non-fluorescent fusion tags derived from green fluorescent protein (GFP). The fusion tags harbor substitutions with respect to GFP that increase expression of target proteins to which the fusion tags are fused; increase solubility; prevent dimerization and oligomerization, particularly in oxidizing environments such as the endoplasmic reticulum (ER); and, in some cases, enhance fluorescence of the fusion tag itself. The substitutions include various combinations of substitutions at select cysteine residues in GFP, substitutions in or near the GFP chromophore, and/or other substitutions. The fusion tags can be used for increasing expression of target proteins for mass production thereof or as a fluorescent tag.
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