I'm trying to standarize in house ELISA for viral detection using recombinant protein. How much antigen should be add per well in 96 well plate? There is a range of µg that is commum used?
Concentration of recombinant proteins used in ELISA is depend on type of antigen and your set-up! As you mentioned there is a wide range of that. I used only 5 ng and it worked with me. Just make your own set up through checkerboard titration where you test serially diluted know positive and negative samples/sera with your antigen and select the best combination.