title: Measurement of complement components in systemic lupus erythematosus by radial immunodiffusion.
abstract: Total hemolytic complement activity (CH50) and levels of C4, C5, and Factor B determined by commercially available radial immunodiffusion plates were compared in sera from patients with systemic lupus erythematosus. There was a significant correlation between CH50, C4 and C5, but no correlation between Factor B and any of the other indices of complement activity measured.
mesh_terms: D003181:Complement C4 / Q000032:analysis*; D003182:Complement C5 / Q000032:analysis*; D003165:Complement System Proteins / Q000032:analysis*; D006801:Humans; D005779:Immunodiffusion; D008180:Lupus Erythematosus, Systemic / Q000276:immunology*; D011414:Properdin / Q000032:analysis*
chemical_list: D003181:Complement C4; D003182:Complement C5; D011414:Properdin; D003165:Complement System Proteins