Erythromycin thiocyanate acts by binding to bacterial 50S ribosomal subunits and inhibits RNA-dependent protein synthesis by blockage of transpeptidation and/or translocation reactions, without affecting synthesis of nucleic acid .Erythromycin thiocyanate
K-252b is an indolocarbazole isolated from the actinomycete Nocardiopsis and is a PKC inhibitor. K-252b can be used to inhibit extracellular kinases of cells in culture because it can’t pass through the cell membrane freely.
Kibdelone A, a natural heterocyclic polyketide, was first isolated from the soil actinomycete Kibdelosporangium. It exhibits potent and selective cytotoxicity against various human tumor cell lines, in addition to showing significant antibacterial and nematocidal activity.