Fig. 2From: The cnidarian Hydractinia echinata employs canonical and highly adapted histones to pack its DNAAnnotated genomic locus and expression profiles of the H1.1 and core histones H2A.1, H2B.1, H3.1 and H4.1 of Hydractinia echinata. a Expression of H1.1, H2B.1, H3.1 and H4.1 in feeding polyps. H2B.1 was analysed using a red fluorescent probe. The white wedge highlights an individual cell expressing H4.1. b Organisation of the genomic locus depicting coding sequences, mapped RNA reads (showing the number of reads mapped), predicted TATA-boxes and 3′-UTR stem-loops. Extended RNA read mapping can be found in Additional file 6: S6. c Co-localisation of gene expression (green) and S-phase (EdU, red). A white wedge highlights histone-expressing cells in S-phase. d Predicted structure of the histone cluster arginine tRNABack to article page