Extended Data Fig. 3. Comparison of the chromosomal architectures of cyclostome genomes.
a, Comparison between two lampreys (Lethenteron reissneri and P. marinus) highlighting the conservation of both chromosomal identity and extensive collinear segments. b, Comparison between the hagfish E. atami and the lamprey P. marinus. In both panels, dots show the relative location of orthologous genes between two species, coloured if the chromosome:chromosome enrichment is significant by Fisher’s exact test (Methods); others shown in grey. The colours in a and b are based on P. marinus and E. atami chromosomes, respectively. In b, P. marinus chromosomes are sorted to aid in visualizing many-to-one mappings shown in Fig. 1d.