TABLE 1.

The position and mutation rate of old-mouse-specific mutations in BALB/cA mice

Position of mouse 28S	Mutation rate in:						Difference in avg ratea	Position of yeast 25S
	Young mice			Old mice
	Male 3	Female 1	Avg	Male 3	Male 4	Avg
4614	0.000	0.001	0.001	0.441	0.396	0.419	0.418	3295
3291	0.001	0.001	0.001	0.039	0.032	0.035	0.034	2131
3094b	0.036	0.038	0.037	0.009	0.007	0.008	−0.029

^aCalculated as the difference between the averages for old mice and young mice.

^bPosition 3094 is not conserved in yeast rDNA.