Figure 11.

Conservation of key post-transcriptionally modified residues in dinoflagellate histone H2A proteins. The radius r refers to the size of the context considered when scoring conservation. When $r=0$, only the residue itself is considered; when $r=1$, a perfect match to the three-amino acid peptide also including the flanking residues on each side is required; when $r=2$, the five-amino acid peptide also including the two flanking residues on each side is considered. The fractions $C/N$ indicate the number of histone H2A proteins C with conserved residues according to the criteria specified by the radius relative to the total number of histone H2A proteins N for each species. All histone H2A sequences with complete N-terminal tails identified in the transcriptomic data are included (the C-terminal portions of the protein were allowed to be incomplete for the purposes of this analysis, but the N factor in the $C/N$ fractions was adjusted accordingly if necessary in cases when gaps in the alignments were due to an incomplete sequence).