experiments with direct immuno-precipitation of 125i-labeled antigens suggested that all four proteins investigated ( human platelet factor 4 , porcine platelet factor 4 , human low affinity platelet factor 4 or human beta-thromboglobulin , and porcine platelet basic protein ) share common antigenic determinants .
C1447076
human beta-thromboglobulin
C1335239
platelet basic protein