Fig. 2
From: Current status and perspectives of genome editing technology for microalgae
Different subtypes of the CRISPR systems (a) and their biological mechanisms of immunity against invading viruses (b). Genes involved in interference are shown in the red boxes and those involved in crRNA biogenesis and adaption in the yellow boxes and green boxes, respectively, mainly based on [74, 80]. The signature gene of each types is indicated by blue letters, and the complex of multiple effector proteins is indicated by gray boxes. Dispensable genes are indicated by dashed lines. LS, large subunit; SS, small subunit