Supplementary File 1	[TXT]	Accession numbers
Supplementary File 2	[TXT]	sequences for Choanozoa in multifasta format
Supplementary File 3	[PDF]	Weblogos for aCCA and eCCA motifs
Supplementary File 4	[TXT]	multiple sequence alignment in (multi)fasta format computed with muscle
Supplementary File 5	[PDF]	maximum likelihood tree computed with RAxML
Supplementary File 6	[TXT]	key to the abbreviations of taxon names
Supplementary Fig. S1	[PDF]	syntheny of genes within the CCA loci of Choanoflagellata. Figure caption: [TXT]
Supplementary Fig. S2	[PDF]	best blast hits for genes of the CCA loci of Choanoflagellata .Figure caption: [TXT]