Age, d

1

7

14

21

28

35

(a) Protease activity in pancreatic tissue, mg/ml/min

average

299 ± 27.5

150 ± 14.9*

246 ± 13.5

229 ± 28.7

252 ± 24.0

431 ± 31.5*

hybrids

323 ± 30.7

200 ± 12.1*a

317 ± 48.9a

278 ± 30.1

325 ± 46.9a

487 ± 43.2*

Plymouth Rock

314 ± 21.1

125 ± 15.7*b

246 ± 32.2

192 ± 50.0*

206 ± 22.6*b

402 ± 32.2*

Cornish

261 ± 36.1

126 ± 14.1*b

175 ± 26.6b

217 ± 68.6

226 ± 24.7

403 ± 87.4

(b) Trypsin activity in serum, U/L

average

206 ± 12.0

23 ± 1.9*

29 ± 1.3*

25 ± 1.4*

19 ± 0.5*

17 ± 1.6*

hybrids

224 ± 12.1

19 ± 4.3*

29 ± 3.9*

23 ± 2.1*

19 ± 1.4*

23 ± 3.6*a

Plymouth Rock

191 ± 11.2

21 ± 1.9*

30 ± 1.4*

23 ± 3.2*

20 ± 1.4*

12 ± 2.5*b

Cornish

203 ± 12.7

29 ± 5.2*

30 ± 3.7*

29 ± 3.6*

18 ± 1.2*

16 ± 1.1*

(c) A1PI concentration in serum, mg/dL

average

20.2 ± 0.30

14.6 ± 0.43*

14.0 ± 0.32

14.2 ± 0.44

13.6 ± 0.41

15.1 ± 0.20*

hybrids

19.9 ± 0.35

14.3 ± 0.38*

14.3 ± 0.34*

15.3 ± 0.89*

13.2 ± 0.53*

15.1 ± 0.52*

Plymouth Rock

20.8 ± 0.45

15.3 ± 0.77*

13.6 ± 0.52*

14.3 ± 0.69*

14.1 ± 0.89*

14.8 ± 0.33*

Cornish

20.0 ± 0.40

14.3 ± 0.52*

14.1 ± 0.44*

13.1 ± 0.29*

13.6 ± 1.38*

15.3 ± 0.59*