soluble complexes prepared over a range of molar ratios of [ 125i ] protein a ( spa ) and rabbit [ 131i ] immunoglobulin g ( igg ) or [ 131i ] fc gamma fragments were separated by ultracentrifugation in a sucrose gradient and selectively radioimmunoprecipitated with chicken antibodies that bind free or complexed spa .
C0020852
immunoglobulin g
C0003241
antibodies