variabilis was found in two regions; trnV and the 15-kb gene cluster, including “trnI-ycf20-psaC-trnN-minD-trnR1-chlN-chlL-ccsA-rpl32-cysT-ycf1-psbA”, are present in inverse orientation between Chlorella sp. ArM0029B and C. variabilis NC64A (Figure 2 and see Additional file 2: ...