Aspartate Kinase (Crude Enzyme)

       Aspartate Kinase，中文名為天冬氨酸激酶，催化天冬氨酸的磷酸化。本產(chǎn)品為大腸桿菌表達的天冬氨酸激酶，并經(jīng)簡單純化獲得的可以確保達到一定酶活力的粗酶液。
       由于本產(chǎn)品需新鮮制備，確認(rèn)訂購后約6個工作日才可以發(fā)貨。
       本產(chǎn)品可以提供十公斤、百公斤乃至噸級的粗酶液。
       Aspartate kinase (aspartokinase, aspartic kinase) is an enzyme that catalyzes the phosphorylation of the amino
acid aspartate. This reaction is the first step in the biosynthesis of three essential amino acids: methionine, lysine, and threonine, known as the "aspartate family". The gene for aspartokinase is present only in microorganisms and plants; it is not present in animals, which must obtain aspartate-family amino acids in their diet.In Escherichia coli, aspartokinase is present as three independently regulated isozymes, each of which is specific to one of the three downstream biochemical pathways. This allows the independent regulation of the rates of methionine, lysine, and threonine production. The forms that produce threonine and lysine are subject to feedback inhibition, and all three can be repressed at the level of gene expression by high concentrations of their end-products.Absence from animals makes these enzymes key targets for new herbicides and biocides and for improvements in nutritional value of crops. This product with the indicated enzyme activity was briefly purified from engineered E.coli.
產(chǎn)品詳細(xì)信息見下表:

包裝清單：

保存條件：
       -20℃或更低溫度保存，至少1個月有效。
注意事項：
       由于本產(chǎn)品需新鮮制備，在您確認(rèn)訂購后約6個工作日才能發(fā)貨。
       粗酶液的每次凍融均可能會引起部分失活，所以收到酶液后請根據(jù)需要進行分裝，并置于-20℃或更低溫度保存。
       隨著保存時間的延長，酶活力會有一定程度的下降，收到產(chǎn)品后應(yīng)盡快使用。
       本產(chǎn)品在生產(chǎn)和保存的過程中可能會有混濁或沉淀產(chǎn)生，融化后混勻即可，不影響正常使用。
       本產(chǎn)品**于專業(yè)人員的科學(xué)研究用，不得用于臨床診斷或**，不得用于食品或藥品，不得存放于普通住宅內(nèi)。
       為了您的**和健康，請穿實驗服并戴一次性手套操作。

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