Fig. 3

a Schematic view of Planktothrix mcy gene cluster and location of mutations found in individual filaments and location of repetitive regions 1 – 7 (in green). Taking all filaments together the relative frequency of each mutation is given in parentheses. ISPlr1, P. rubescens IS element containing the conserved DDE domain for DNA transposition [9]; b Alignment of repetitive sequence regions within the P. agardhii NIVA-CYA126/8 mcy gene cluster (ASAK00000000). The framed boxes indicate the short directly repeated sequences (DR) of 10 bp in length resulting in insertion of transposable element ISPlr1. Bold letters indicate palindromic sequences