H. Ueda et al., OPEN SANDWICH ELISA - A NOVEL IMMUNOASSAY BASED ON THE INTERCHAIN INTERACTION OF ANTIBODY VARIABLE REGION, Nature biotechnology, 14(13), 1996, pp. 1714-1718
We describe an immunoassay that is based on the interchain interaction
of separated V-L and V-H chains from a single chain antibody variable
region. In the presence of antigen, the chains reassociate. V-L fragm
ents of anti-hen egg lysozyme (HEL) antibody HyHEL-10 were immobilized
on microtiter plates, Samples were coincubated with an M13-displayed
V-H chain, and assayed with peroxidase-labeled anti-M13 antibody. Sign
al was detected in direct proportion to the amount of HEL in the sampl
e. Wide dynamic range with <15 ng/ml sensitivity was attained.