書誌事項
- タイトル別名
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- Denaturation of carp myosin B during frozen and supercooled storage at -8.DEG.C.
- コイミオシン B ノ -8ドC トウケツ チョゾウ オヨビ -8ドC カレイキ
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In order to study the participation of concentrated salt solution in denaturation of myosin Bduring frozen storage, carp myosin B in KCI solution was stored for 17 days in frozen and super-cooled state at-8°C and the extent of denaturation was compared. The comparison was also made with that of myosin B stored at O°C and frozen-stored at-20°C. The extent of denatura-tion was followed up by changes in solubility, Ca-ATPase activity, reduced viscosity and streamingbirefringence of the solutign, and form of myosin B filaments. The apparent rate constant forinactivation of Ca-ATPase(kD, day-1)of myosin B in O storage was 0.018 and those in-8°C-supercooled-and-20°C-frozen-storage were equally 0.074. In contrast to the above values, the kD in-8°C-frozen-storage was 0.691 at a very early stage(0-2 days)and 0.028 for the period ofthe subsequent 15 days. The reduced viscosity of the myosin B solution decreased rapidly withinaday when stored in the frozen state at-8°C, but decreased very slowly within the first 3 dayswhen stored in the supercooled state at the same temperature. In the case of the-8°C-frozen-storage, the streaming birefringence was not detected after a day, but in the cases of three otherstorage conditions it could be observed. The electron microscopic observation showed that thedeformation of myosin B filaments was accelerated is the early stage of-8°C-frozen-storage.Their filamentous form changed to granular form and the filamentous form of myosin B disap-peared after 2 days. During both-8°C-supercooled-storage and-20°C-frozen-Storage, themorphological change of myosin B filaments occurred gradually and the extent of the change was very similar in each case, and the filamentous form of myosin B remained intact even after 17 days. These findings show that the denaturation of myosin B during-8°C-frozen-storage isaccelerated to some extent by temperature depression itself and significantly by concentrated unfrozen KCI solution.
収録刊行物
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- 日本水産学会誌
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日本水産学会誌 53 (5), 789-794, 1987
公益社団法人 日本水産学会
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詳細情報 詳細情報について
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- CRID
- 1390001206411256832
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- NII論文ID
- 130000920971
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- NII書誌ID
- AN00193422
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- ISSN
- 1349998X
- 00215392
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- NDL書誌ID
- 3132936
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
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- 抄録ライセンスフラグ
- 使用不可