Monoclonal antibodies to estradiol Description: Monoclonal antibodies raised against oestradiol-6-carboxymethyl oxime-BSA. Available clones: 2F9 (Rat, IgG2a), 15 (IgG2b), 8D9 (IgG2a). Estradiol is a sex hormone, which has not only a critical impact on reproductive and sexual functioning, but also affects other organs, including the bones. In the female, estradiol acts as a growth hormone for tissues of the reproductive organs.