The extent of nucleotide differences (divergences) per synonymous site values of seven gametologs in eutherians and marsupials.

*1: In humans, the following genes possess multiple copies (number of copies); HSFX (2), HSFY (2), RBMY (7), XKRY (8), and RPS4Y (2). For genes with multiple copies, the average value was taken over all X-Y pairs.*2: Differences were calculated using a modified version of the Nei-Gojobori method. Values in parentheses were KS estimated with corrections by the Jukes-Cantor Method. The standard error (values after “±”) was calculated from the maximum variance [53] and by [54].*3: Previous stratum was defined by previous studies [7], [18].*4: For other sequences, nucleotide differences and divergences in marsupial UBE1X/Y and UBE1X/Yb are calculated from a comparison of opossum X with kangaroo Y. However, those in marsupial UBE1X/Ya could not be calculated because the corresponding nucleotide sequence of kangaroo is not available. Values for RSMBX/Y, SOX3/SRY, and HSFX/Y are gametologs in wallaby, those in dunnart, and opossum X and kangaroo Y, respectively.