MERACTINOMYCIN
\mˈɛɹɐktˌɪnəmˌɪsɪn], \mˈɛɹɐktˌɪnəmˌɪsɪn], \m_ˈɛ_ɹ_ɐ_k_t_ˌɪ_n_ə_m_ˌɪ_s_ɪ_n]\
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An antitumor antibiotic derived from Streptomyces parvullus. It binds to DNA and inhibits RNA synthesis (transcription), with chain elongation more sensitive than initiation, termination, or release. As a result of impaired mRNA production, protein synthesis also declines after dactinomycin therapy. (From AMA Drug Evaluations Annual, 1993, p2015)
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