SDS-PAGE analysis of purified anti-CXCL4 monoclonal antibody. Eluted solutions from the protein G affinity column were estimated by Coomassie staining after 8% SDS-PAGE. (A) Non-reducing SDS-PAGE electrophoresis. Lane 2, flow-through fraction; lane 3, wash fraction; lanes 4–8, elution fractions. (B) Reducing SDS-PAGE electrophoresis. Lane 2, flow-through fraction; lane 3, wash fraction; lanes 4–8, elution fractions.