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The HaloLink Protein Array System combines the innovative HaloTag technology, surface engineering and cell-free protein expression systems to enable parallel analysis of multiple protein:protein, protein:drug or protein:nucleic acid interactions.

Protein arrays enable parallel analysis of multiple protein:protein, protein:drug or protein:nucleic acid interactions. The HaloLink Protein Array System provides a way to create homebrew (on-demand) protein arrays by combining innovative HaloTag technology, surface engineering and cell-free protein expression systems. The HaloTag protein is a mutated hydrolase that forms a covalent bond with HaloTag ligands. Under physiological conditions binding is rapid and highly specific, yielding a complex that is stable even under stringent conditions. Using the HaloLink Protein Array System, HaloTag fusion proteins are expressed in a cell-free expression system and then covalently captured on hydrogel-coated glass slides derivatized with HaloTag Ligands. The fusion proteins are captured directly from the expression reaction mixture without prior purification. Using this approach, multiple fusion proteins can be rapidly synthesized and immobilized in parallel on the slide surface, and an entire experiment including protein expression, custom array formation and protein interaction analysis can be completed in less than eight hours. The HaloLink Array Six Slide System contains HaloLink Slides, HaloLink Array Gaskets and Anti-HaloTag Antibody. To use the Six Slide System you will need to provide your own protein expression system or order the TNT T7 Quick Coupled Transcription/Translation System (Cat.# L1170 or L1171) or TNT SP6 High-Yield Wheat Germ Protein Expression System (Cat.# L3260 or L3261). The HaloTag Standard Protein (Cat.# G4491) is not included with the Six Slide System but can be ordered separately. The HaloTag technology offers a quick and convenient way to test protein expression of HaloTag fusion proteins by labeling with fluorescent HaloTag TMR Ligand followed by SDS-PAGE analysis. Guidelines can be found in the HaloLink Protein Array Technical Manual #TM310. The Protein G HaloTag Fusion Protein (Cat.# G7291) is a protein consisting of recombinant Protein G from Streptococci without the albumin-binding domain and HaloTag protein. The Protein G HaloTag Fusion Protein, which has a molecular weight of 58kDa, can be covalently coupled to different chloroalkane surfaces, reactive and fluorescent HaloTag ligands. This fusion protein enables an oriented attachment of antibodies to the HaloLink Protein Arrays.