Table 4.

Rates of [³²P]dCTP incorporation or incorporation followed by ligation in brain and liver tissue homogenates from 15 mammalian and avian species

Species	Brain incorporation mean ± SEM	Liver incorporation mean ± SEM	Liver incorporation + ligation mean ± SEM
Mammalian
Bat	229.96 ± 31.78	47.98 ± 7.17	7.21 ± 2.13
Mouse	117.44 ± 7.80	32.13 ± 5.66	8.51 ± 2.48
Gerbil	106.78 ± 19.41	35.00 ± 2.80	34.73 ± 15.85
Hamster	97.41 ± 13.98	38.18 ± 1.50	39.25 ± 8.84
Squirrel	103.37 ± 9.32	33.86 ± 3.40	11.53 ± 2.91
Rat	135.54 ± 16.72	44.51 ± 3.91	24.02 ± 6.08
Guinea pig	84.29 ± 17.23	28.05 ± 3.31	10.26 ± 2.45
Rabbit	128.04 ± 13.10	19.91 ± 1.68	4.94 ± 0.95
Dog	61.61 ± 9.73	N/A	N/A
Sheep	57.46 ± 11.28	17.11 ± 1.56	1.73 ± 0.22
Pig	91.40 ± 7.66	51.55 ± 7.29	13.74 ± 3.50
Deer	72.12 ± 15.72	11.51 ± 0.89	3.09 ± 0.26
Cow	35.73 ± 5.66	16.10 ± 1.09	3.10 ± 0.58
Avian
Finch	126.50 ± 4.90 (168)	19.43 ± 2.19 (25)	13.21 ± 3.08 (17)
Quail	86.35 ± 7.94 (114)	31.59 ± 4.22 (41)	14.53 ± 3.33 (18)

Data are presented in the units Δ signal strength/μg/min. Sample size (n) for each species is as in Table 1. Each sample (from a given individual) was assayed twice to provide an average for that individual. Numbers in parentheses represent calculated corrections for higher avian body temperatures using an estimated Q₁₀ = 2 and a temperature differential (avian versus mammalian body temperature) of 4°C