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Chemical structure of cylindrospermopsin and its biosynthetic gene (cyr) cluster in the cyanobacterium Cylindrospermopsis raciborskii AWT205. Red – PKS/NRPS, green – uracil ring, black – tailoring, blue – transport, white – transposase, orange – amidinotransferase, purple – regulator (Adapted from Mihali et al., 2008).
