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We developed an improved microtiter-based assay for the detection of polymerase chain reaction (PCR)-amplified DNA sequences. The synthetic DNA sequences used to prime the PCR were labeled with biotin at their 5' ends so that the specific PCR product was labeled with biotin. Following amplification, an aliquot of the PCR product was denatured and hybridized to a capture DNA sequence immobilized in a microtiter well. The capture sequence was complementary to a portion of the sequence between the primers, so that only extended primers were captured. The captured PCR product was detected colorimetrically by using a streptavidin-peroxidase conjugate and tetramethylbenzidine substrate.

Detection of human immunodeficiency virus type 1 DNA by polymerase chain reaction amplification and capture hybridization in microtiter wells