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[求助]
幾句話(huà),先謝謝了
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1.通過(guò)用透明膠帶將20個(gè)梳齒封住從而變成一個(gè)大的梳齒. 2.從中切取2個(gè)小膠條(同時(shí)在原膠條相應(yīng)部位做好標(biāo)記),并將其中一膠條斜切成3段貼放在含有5 mM PNPG底物的0.8% 瓊脂糖凝膠中于55 °C 溫育20min后,滴加數(shù)滴0.5 M Na2CO3,而另一小膠條則放置于考馬斯亮藍(lán)溶液中染色 . 3.與 Lee等人的報(bào)道相似 糖酶是一類(lèi)誘導(dǎo)酶,在菌株發(fā)酵培養(yǎng)過(guò)程中,添加淀粉類(lèi)物質(zhì)、如麥芽糖等不僅有利于微生物的生長(zhǎng),而且可提高酶分泌的能力,其中木薯淀粉糖化液表現(xiàn)最為明顯,最高酶轉(zhuǎn)苷活力和水解活力分別達(dá)到111和12U/ml,菌體干重為 2g/l。乳糖有利于菌體長(zhǎng),但卻阻礙了酶的分泌;添加木糖時(shí),微生物的生長(zhǎng)受抑制,酶的合成量極少,幾乎沒(méi)有或者阻遏酶的合成,其主要原因是該物質(zhì)不能誘導(dǎo)基因的表達(dá),此外,該條件下限制了菌體生長(zhǎng),從而導(dǎo)致酶產(chǎn)量的降低。 |

鐵桿木蟲(chóng) (知名作家)
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1.通過(guò)用透明膠帶將20個(gè)梳齒封住從而變成一個(gè)大的梳齒. 20 combs were bounded by scotch tapes to form one big comb 2.從中切取2個(gè)小膠條(同時(shí)在原膠條相應(yīng)部位做好標(biāo)記),并將其中一膠條斜切成3段貼放在含有5 mM PNPG底物的0.8% 瓊脂糖凝膠中于55 °C 溫育20min后,滴加數(shù)滴0.5 M Na2CO3,而另一小膠條則放置于考馬斯亮藍(lán)溶液中染色 2. 2 small strips then were cut at random (and made corresponding marks in the original tapes), and cut one of the two into 3 smaller ones and had them affixed on the 0.8% agarose gel with 5 mM PNPG substrate and incubated at 55 C for 20 min before dropping a few drops of 0.5 M Na2CO3. We then placed the other strip in the solution of Coomassie brilliant blue staining. |

鐵桿木蟲(chóng) (知名作家)
|
3.與 Lee等人的報(bào)道相似 糖酶是一類(lèi)誘導(dǎo)酶,在菌株發(fā)酵培養(yǎng)過(guò)程中,添加淀粉類(lèi)物質(zhì)、如麥芽糖等不僅有利于微生物的生長(zhǎng),而且可提高酶分泌的能力,其中木薯淀粉糖化液表現(xiàn)最為明顯,最高酶轉(zhuǎn)苷活力和水解活力分別達(dá)到111和12U/ml,菌體干重為 2g/l。乳糖有利于菌體長(zhǎng),但卻阻礙了酶的分泌;添加木糖時(shí),微生物的生長(zhǎng)受抑制,酶的合成量極少,幾乎沒(méi)有或者阻遏酶的合成,其主要原因是該物質(zhì)不能誘導(dǎo)基因的表達(dá),此外,該條件下限制了菌體生長(zhǎng),從而導(dǎo)致酶產(chǎn)量的降低。 3. Similar to the reports by Lee et al which claimed that enzyme was a kind of sugar-induced enzyme. During the process of the fermental cultivation of strains, if starch substances, such as maltose, were added, the ability of enzyme secretion would be improved, among which cassava starch saccharification liquid was the most striking one, with its enzyme-turn-glycosides activity and hydrolysis activity reaching 111 and 12U/ml respectively and its dried cell of 2g/l. Lactose was conducive to cell length, but it hindered the enzyme secretion. When xylose was added, the growth of microorganisms was inhibited and there was hardly any synthesis of enzyme which might due to the fact that this substance could not induce gene expression. In addition, the cell growth was limited under the conditions which resulted in the low production of enzyme |

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