Supplementary File 4

Multifasta file with 1,957 genes used in phylotenetic analyses supporting 1R/2R (132 in sea cucumber, 132 in Belcher’s lancelet, 24 in Florida lancelet, 363 in hagfish, 703 in sea lamprey, 94 in elephant shark, 316 in chicken, 323 in spotted gar). Gene alignments were visually inspected and manually curated if necessary as described in Supplementary Information. Related to Figure 4a.