Below is a fragment of a description of a certain ELISA type. Write the correct name of ELISA type in the answer field (for example: Direct ELISA).
"It's the most commonly used format. This format requires two antibodies specific for different epitopes of the antigen. These two antibodies are normally referred to as matched antibody pairs. One of the antibodies is coated on the surface of the multi-well plate and used as a capture antibody to .."