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Definition of Rapamycin
1. Noun. (medicine) An immunosuppressant, extracted from ''Streptomyces hygroscopicus'', used in tissue transplantation. ¹
¹ Source: wiktionary.com
Medical Definition of Rapamycin
1. Immunosuppressive macrolide antibiotic with structural similarity to FK506, inhibits T and B-cell proliferation but at a much later stage than FK506, despite binding to the same immunophilin. Inhibits TOR (target of rapamycin) in the Ras/MAP kinase signalling pathway. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)