The traditional methods of generating protein arrays require the separate expression of hundreds of proteins, followed by purification and immobilization of the proteins on a solid surface. Cell-Free protein array technology produces protein microarrays by performing in vitro synthesis of the target protein from their DNA templates.
One approach for the generation of cell- free based microarrays is the nucleic acid programmable protein array (NAPPA).

NAPPA uses DNA template that is biotinylated and is bound to avidin that is pre-coated onto the protein capture surface. Newly synthesized proteins which are tagged with GST are then immobilized next to the template DNA by binding to an adjacent polyclonal anti-GST capture antibody. The following references illustrate the use of NAPPA to screen hundreds of proteins. Continue reading “Cell-Free Applications:Protein Arrays (Nucleic Acid Programmable)”