Figure 8. RNAi knockdown of COMPASS complex genes. Planarians were fed dsRNA targeting the indicated gene six times over three weeks and then amputated pre-pharyngeally to assay regeneration. gfp(RNAi) served as a negative control. The worms in the upper and lower panels were imaged after six or ten days of regeneration, respectively. Yellow dashed lines mark the plane of amputation. White triangles indicate reduced blastema formation, green arrowheads indicate normal photoreceptors, and magenta arrows indicate underdeveloped photoreceptors. Scale bars = 0.5 mm.