Table 1.

Sequence Divergence and Assigned Strata for X-Y Gene Pairs, Mus musculus

	Gene pair	cM position on mouse X^a	Mouse sequence compared (nt)	K_s (s.d.)^b	Mouse stratum^c	Human stratum^d
A	Sox3/Sry^e	24.5	231	1.587 (0.7066)	1	1
B	Rbmx/y	NA	1092	0.986 (0.1595)	1	1
C	Smcx/y	64.0	4608	0.966 (0.0646)	1	2
H	Eif2s3x/y	32.0	1419	0.758 (0.0935)	2	NA
D	Ube1x/Ube1y1	5.7	3174	0.739 (0.0605)	2	2
E	Usp9x/y	5.5	7623	0.579 (0.0333)	3	3
F	Zfx/y-2	34.8	2343	0.569 (0.0603)	3	3
G	Utx/y	5.5	3543	0.467 (0.0389)	3	3

↵a Mouse Genome Database, Mouse Genome Informatics Web Site, The Jackson Laboratory, Bar Harbor, Maine, http://www.informatics.jax.org, February 2003
↵b K_s: synonymous substitutions per synonymous site and standard deviation calculated using a modification of Li's (1993) method implemented in the “diverge” program in the GCG software package (Wisconsin Package Version 10.3, Accelrys)
↵c Strata based on K_s distances between X-Y gene pairs
↵d Strata correspond to Lahn and Page (1999)
↵e HMG box sequences only

Evolutionary Strata on the Mouse X Chromosome Correspond to Strata on the Human X Chromosome