This mAb is highly specific to testosterone. Its affinity constant for testosterone is ~1010M-1. In competitive binding immunoassay, it reacts with testosterone 100%, 11-beta-hydroxy testosterone 3.3%, 17-alpha-methyl testosterone

Store the Testosterone antibody at 2-8°C (with azide) or aliquot and store at -20°C or colder (without azide).