has part has part is about has_specified_input has_specified_output protein domain specific binding protein-containing complex western blot assay binding assay far-western blot assay An assay that measures protein-protein interactions by separating target proteins on an SDS-PAGE gel, transfering them to a solid substrate, hybridizing with a protein probe and visualizing bound proteins using a probe-directed antibody. This is a adaptation on the western blot assay.