The is7 transgene recapitulates key features of constitutive heterochromatin. (A–B) Brightfield (top) and fluorescence (bottom) images of representative wild-type (A) and is7/+(B) larva at 3 days post-fertilization (dpf). Scale bar indicates 1 mm. (C–D) Levels of the histone modifications H3K9me3, H4K20me3 and H3K27me3 at the is7 transgene array (C) or Sat1 pericentromeric repeats (D) as assessed by chromatin immunoprecipitation quantitative PCR (ChIP-qPCR). (E) 5-methycytosine (5 mC) enrichment (filled circles) at the is7 transgene array in two representative larval pools as detected by sodium bisulfite sequencing. Error bars indicate standard deviation.
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