UCN-02 is a indolocarbazole isolated from a high staurosporine-producing Streptomyces culture. UCN-02 is isolated as a minor co-metabolite of high staurosporine-producing strains of selected actinomycetes. Although less selective than its isomer UCN-01, UCN-02 exhibits comparable activity and probably acts by similar mechanisms. UCN-02 is an inhibitor of PKC α, PKC β, PKC δ, PKCε and PKC γ.
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