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Springer Science and Business Media LLC Scientific Reports 14(1)
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    초록·키워드

    The analysis of recombinant proteins in complex solutions is often accomplished with tag-specific antibodies in western blots. Recently, I introduced an antibody-free alternative wherein tagged proteins are visualized directly within polyacrylamide gels. For this, I used the protein ligase Connectase to selectively attach fluorophores to target proteins possessing an N-terminal recognition sequence. In this study, I extend this methodology to encompass the detection and quantification of C-terminally tagged proteins. Similar to the N-terminal labeling method, this adapted procedure offers increased speed, heightened sensitivity, and an improved signal-to-noise ratio when compared to western blots. It also eliminates the need for sample-specific optimization, enables more consistent and precise quantifications, and uses freely available reagents. This study broadens the applicability of in-gel fluorescence detection methods and thereby facilitates research on recombinant proteins.

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