Table 1 Commercial protease inhibitory activities of PEG fractions obtained from the crude extracts of fish roes by the polyethylene glycol precipitation toward casein as a substrate

235.0

100.0

40.4

100.0

925.6

100.0

144.0

100.0

−44.9

−3.3

−537.2

−347.3

210.3

0.2

209.3

3.2

−65.9

−0.6

−42.7

−2.5

180.6

1.2

85.8

1.8

−23.4

−0.9

−4.7

−1.4

−160.1

−2.1

37.2

3.3

−65.3

−0.8

28.4

10.6

−26.7

−0.4

18.5

1.6

16.8

100.0

−58.7

100.0

9.9

100.0

16.2

100.0

17.9

18.4

−93.1

41.4

72.6

6.8

45.7

6.2

5.9

0.7

−23.0

0.9

−32.1

−20.2

−23.3

−4.2

17.3

9.5

−30.1

6.3

−28.6

−35.5

−26.4

−20.6

−14.1

−2.4

−19.4

5.0

−50.2

−62.5

−21.1

−15.7

38.4

100.0

−54.5

100.0

35.6

100.0

112.5

100.0

0.9

0.4

−66.2

31.7

618.6

16.1

566.2

11.0

220.8

11.8

20.3

−0.9

50.6

8.9

137.0

3.6

55.0

13.2

−42.9

9.6

9.3

3.2

50.5

5.7

137.0

10.1

−23.2

6.4

15.8

5.5

22.4

2.4

2183.9

100.0

672.5

100.0

1678.6

100.0

695.3

100.0

673.4

5.3

−1477.5

−57.4

5768.6

3.2

2475.6

7.8

1776.3

1.7

668.7

2.4

903.2

3.4

322.8

1.4

767.7

3.2

288.4

5.2

1311.0

9.6

511.2

9.3

9278.3

12.0

537.5

12.0

6687.0

49.1

3951.1

68.7

73.1

100.0

74.5

100.0

81.4

100.0

44.3

100.0

23.7

5.6

−990.1

−347.2

1999.7

22.7

−298.7

−14.8

−259.4

−7.3

−416.9

−13.3

−513.2

−39.3

−299.0

−19.9

−255.4

−32.2

−190.1

−31.2

302.8

45.7

118.9

33.9

1170.9

45.2

98.2

19.8

2064.2

312.4

1536.2

419.2