Antigen
In immunology, antigens (Ag) are structures (aka substances) specifically bound by antibodies (Ab) or a cell surface version of Ab ~ B cell antigen receptor (BCR). The term antigen originally described a structural molecule that binds specifically to an antibody only in the form of native antigen. It was expanded later to refer to any molecule or a linear molecular fragment after processing the native antigen that can be recognized by T-cell receptor (TCR). BCR and TCR are both highly variable antigen receptors diversified by somatic V(D)J recombination. Both T cells and B cells are cellular components of adaptive immunity. The Ag abbreviation stands for an antibody generator.
List of antiandrogens
This is a list of antiandrogens, or drugs that prevent the effects of androgens like testosterone and dihydrotestosterone (DHT). It includes direct antagonists of the androgen receptor (AR), androgen synthesis inhibitors like 5α-reductase inhibitors and CYP17A1 inhibitors, and antigonadotropins like analogues, estrogens, and progestogens. In addition, it includes both steroidal antiandrogen (SAAs) and nonsteroidal antiandrogen (NSAAs). Only antiandrogens that have been marketed are included in this list.Note that in addition to acting as AR antagonists, most SAAs also act as potent progestogens and therefore antigonadotropins.