in this radioimmunoassay for human retinol-binding protein ( rbp ) , sample ( serum , diluted as much as 3600-fold ; or urine , diluted or undiluted ) or calibrant ( purified rbp in phosphate buffer containing bovine serum albumin ) is incubated with 125i-labeled rbp and rabbit anti-human rbp antiserum for 24 h before separation with second antibody/polyethylene glycol .
C0020960
antiserum
C0003241
antibody