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β-甘露聚糖酶     
相关语句
  β-mannanase
     Heterologous expression of manL in Escherichia coli JM109 resulted in 325 u/mL of β-mannanase in 12 h.
     将manL在大肠杆菌JM109中表达,在12h内可表达325u/mLβ-甘露聚糖酶.
短句来源
     Results: Successfully expressed the β-Mannanase that specific activity is 0.90 IU/ml.
     结果:成功表达出β-甘露聚糖酶,其比活力为0.90IU/ml。
短句来源
     β-mannanase from microorganisms which is known asβ-1.4-D-mannan mannanohydrolase (EC.3.2.1.78 )for short is investigated relatively late.
     微生物β-甘露聚糖酶是β-1.4-D-甘露聚糖(β-1.4-D-mannan mannanohydrolase,EC.3.2.1.78)的简称,是一个被研究相对较晚的酶类。
短句来源
     Study of β-mannanase Fermentation Control System Based on PROFIBUS-DP
     基于PROFIBUS-DP的β-甘露聚糖酶发酵控制系统的研究
短句来源
     Study on β-mannanase Fermentation Conditions of Bacillus Amyloliquefaciens R_(10)
     β-甘露聚糖酶产生菌R_(10)发酵条件研究
短句来源
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  β mannanase
     THE PURIFICATION AND PROPERTIES OF ALKALINE β MANNANASE PRODUCED BY ALKALOPHILIC BACILLUS SP. NTT33
     嗜碱细菌NTT33碱性β-甘露聚糖酶的纯化与性质研究
短句来源
     Fermentation Conditions of Alkaline β Mannanase Produced by Alkalophilic Bacillus sp. and Selection of high Producing strains
     嗜碱芽孢杆菌NTT33产碱性β-甘露聚糖酶发酵条件的研究及高产菌株选育
短句来源
     Purification and Some Properties of Neutral β Mannanase from Bacillus subtilis
     枯草芽孢杆菌中性β-甘露聚糖酶的纯化及性质研究
短句来源
  β-mannosidase
     In order to investigate the relationships among β-mannanase,β-mannosidase and α-galactosidase required for degrading galactomannan in cell wall during and following rice seed germination,the activities of the three enzymes and the effects of ABA and GA3 on them were detected.
     为了研究在种子萌发过程中与细胞壁半乳甘露聚糖降解相关的β-甘露聚糖酶、β-甘露糖苷酶和α-半乳糖苷酶之间的关系,对水稻种子萌发过程中这3种酶的活性变化及GA3和ABA对酶活性的影响进行了研究。
短句来源
     Bacillus Licheniformis NK-27 is capable of producing extracellular β-mannanase and intracellular β-mannosidase.
     地衣芽孢杆菌 NK-2 7菌株可以产生胞外β-甘露聚糖酶和胞内β-甘露糖苷酶 .
短句来源
     The amyL promoter and signal sequence was functionally directed the expression and secretion of the β-mannosidase in E. coli cells with the expression level of 295U/mL.
     将amyL的启动子序列和信号肽序列与B.licheniformisCICIM B2004的β-甘露聚糖酶结构基因进行读框内重组,在大肠杆菌中获得了β-甘露聚糖酶的分泌表达,重组大肠杆菌表达295U/mL的β-甘露聚糖酶酶活。
短句来源
     The activities of β-mannosidase and α-galactosidase were detected in dry and non-germination rice seeds,and increased slowly during and following germination.
     在干种子和萌发前的种子中β-甘露糖苷酶和α-半乳糖苷酶活性就已经存在,而β-甘露聚糖酶活性只在萌发后才能检测到;
短句来源
  endo-β-mannanase
     Expression of Endo-β-mannanase Gene from Trichoderma reesei in Pichia pastoris
     里氏木霉内切-β-甘露聚糖酶基因在毕赤酵母中的表达
短句来源
     In order to investigate the effect of phytohormone on the activities of endo-β-mannanase which was produced during and following seed germination,we took the rice (Oryza sativa L.cv. Taizhong 65,a japonica subspecies) seeds as material.
     为了研究GA3和ABA对种子萌发过程中产生的β-甘露聚糖酶活性的影响,以水稻种子作为研究材料,测定了GA3和ABA存在情况下的β-甘露聚糖酶活性,结果表明:GA3和ABA不仅对水稻种子萌发有明显的促进和抑制作用,对种子萌发过程中β-甘露聚糖酶活性也有显著的影响。
短句来源
     The first detection of endo-β-mannanase activity was brought forward from 48 h to 36 h from the start of imbibition and activity was increased dramatically by 50 μM GA3,whereas germination percent and endo-β-mannanase activity were inhibited by 100 μM ABA, and 50 μM GA3 could suppress the effect of ABA to some extent.
     但是50μMGA3可恢复ABA对β-甘露聚糖酶活性的抑制作用。 去胚的半粒水稻种子在水中吸涨时检测不到β-甘露聚糖酶的活性,但在水中加入50μMGA3后,可恢复去胚半粒种子产生酶活性的能力。
短句来源
     Phytohormone Influenced on Activity of Endo-β-mannanase During and Following Rice Seed Germination
     植物激素对水稻种子萌发过程中β-甘露聚糖酶活性的调控
短句来源
     By cutting rice seeds into embryoless half-grains,it was shown that embryo was required for the synthesis of endo-β-mannanase in the aleurone layer and this role of embryo could be replaced by exogenous GA3.
     因此,推测水稻种子萌发时β-甘露聚糖酶活性的产生可能是由胚中而来的某种物质所诱导,而这种物质很可能就是GA3。
短句来源
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  β-mannanase
β-Mannanase catalyzes endo-wise hydrolysis of the backbone of mannan and heteromannan, which are abundant in the cell wall structure of ungerminated leguminous seeds.
      
The mature β-mannanase originated from Bacillus subtilis was expressed in Pichia pastoris, a methylotrophic yeast, using the leader peptide sequence of Saccharomyces cerevisiaeα-factor.
      
The cultivation of β-mannanase expressing Pichia pastoris yields up to 1.8 g/L protein.
      
The properties of the β-mannanase were characterized.
      
Cloning, sequence analysis, and heterologous expression of a β-mannanase gene from Bacillus subtilis Z-2
      
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  β-mannosidase
The enzymes differed in function and cellular localization: endo-β-1,4-mannanase was secreted into the culture fluid, β-mannosidase was strictly intracellular, and α-galactosidase and β-glucosidase were found both extracellularly and intracellularly.
      
Among these enzyme components, only extracellular β-mannanase and intracellular β-mannosidase were inducible.
      
The production of β-mannanase and β-mannosidase was 10- to 100-fold higher in galactomannan medium than in medium with one of the other carbon sources.
      
β-mannanase and β-mannosidase were coinduced in glucose-grown cells by galactomannan, galactoglucomannan, and β-1,4-manno-oligosaccharides.
      
The natural inducer of extracellular β-mannanase and intracellular β-mannosidase appeared to be β-1,4-mannobiose.
      
更多          
  endo-β-mannanase
Evaluation of an endo-β-mannanase produced by Streptomyces ipomoea CECT?3341 for the biobleaching of pine kraft pulps
      
An endo-β-mannanase (EC?3.2.1.78) from Streptomyces ipomoea CECT?3341 was purified and applied to the biobleaching of pine kraft pulps.
      
The maximum level of endo-β-mannanase activity (0.6?units ml-1) was achieved after 4?days of growth in a medium containing locust bean gum and yeast extract.
      
The action of proteases detected in the culture supernatant could be responsible for such events, suggesting that only one endo-β-mannanase is produced by S.
      
Grand Rapids) stimulated to germinate by gibberellin and red light produce large amounts of endo-β-mannanase.
      
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  其他


The fermentation of β-mannanase from an alkaliphilic Bacillus sp. has been studied in 16L tank. The optimum ventilation quantity and agitation speed were 1:1 vvm and 500r/min respectively. The fermentation cycle was 40 h and the highest β- mannanase activity was 300 u/ml.

本文报道碱性β-甘露聚糖酶16L罐的发酵工艺。在发酵过程中,通气量影响菌体生长,最适通气量为1:0.75—1:1.0vvm。搅拌速度影响菌体产酶,最适搅拌速度为500r/min。碳源为魔芋粉,其适宜浓度为2%。发酵周期为40小时。发酵液中β-甘露聚糖酶的酶活力达300u/ml,比摇床上培养提高了2倍。

Nine strains of Bacillus producing B-mannanase were isolated from soil. Some conditions for B-mannanase production from Bacillus sp. M50 was studied in shake flask (30ml in 250ml flask). The optimal cultivation condition for β-mannanase production were : Na2CO3 0. 35% ; temperature 32-34℃ and cultivation time for 60h and B-mannanase activity was 100-140u× ml.Fermentation of B-mannanase form M50 has been carried out in 100L tank. The temperature,ventilation quantity and agitation speed were 30-32℃ ; 1 : 0. 75vvm...

Nine strains of Bacillus producing B-mannanase were isolated from soil. Some conditions for B-mannanase production from Bacillus sp. M50 was studied in shake flask (30ml in 250ml flask). The optimal cultivation condition for β-mannanase production were : Na2CO3 0. 35% ; temperature 32-34℃ and cultivation time for 60h and B-mannanase activity was 100-140u× ml.Fermentation of B-mannanase form M50 has been carried out in 100L tank. The temperature,ventilation quantity and agitation speed were 30-32℃ ; 1 : 0. 75vvm and 200r. min-1 respectively. The fermentation cycle was 28h and the hightest B-mannanase activity was 330u × ml-1. The optimal temperature and pH for β-mannanase reaction were 50 ℃ and 6. 0 respectively. It showed a hight stability at pH4. 0-7. 0 and temperature below 50℃. The activity of enzyme were strongly mhibned by Al3+.EDTA,Hg2+and slightly stimulated by Ba2+.Mn2+.

从土壤中分离到9株产β-甘露聚糖酶的芽孢杆菌(Bacillus sp. ),Bacillus sp. M250ml三角瓶摇瓶培养试验,产酶最适条件为32~34℃、0.35% Na_2CO_3、发酵60h 酶活力为100~140u·ml~(-1)。100L罐发酵,在30~32℃、1:0.75vvm通气量、200r·min~(-1)条件下,发酵液酶活力高达330u·ml~(-1)。酶的最适反应温度和pH分别为50℃和6.0。在低于50℃,pH5.0~7.0酶稳定。Fe~(3+)、Al~(3+)、EDTA、Hg~(2+)对酶有抑制作用,Mn~(2+)、Ba~(2+)对酶有激活作用。

An extracellular neutral endo β mannanase(endo β 1,4 D mannan mannanohydrolase,EC 3.2.1.78)of Bacillus subtilis BM9602 was purified to electrophoretic homogeneity by ammonium sulfate precipitation and DEAE cellulose DE22 chromatography with 45.5 fold and 5.9% yield.\;It's molecular weight and pl value were 35 kD by SDS\|PAGE and 4.5 by isoelectric focusing,respectively.The enzyme was the most active at pH 5.8.The optimum temperature of the enzyme activity was 50℃.The enzyme was stable at pH 6.0~8.0...

An extracellular neutral endo β mannanase(endo β 1,4 D mannan mannanohydrolase,EC 3.2.1.78)of Bacillus subtilis BM9602 was purified to electrophoretic homogeneity by ammonium sulfate precipitation and DEAE cellulose DE22 chromatography with 45.5 fold and 5.9% yield.\;It's molecular weight and pl value were 35 kD by SDS\|PAGE and 4.5 by isoelectric focusing,respectively.The enzyme was the most active at pH 5.8.The optimum temperature of the enzyme activity was 50℃.The enzyme was stable at pH 6.0~8.0 and below 50℃.The activity of the enzyme was inhibited by Hg 2+ ,Ag + strongly.For various substrates,such as locust bean gum,guar gum,sesbania gum and konjac gum, K m and V max value of the enzyme were 3.8,14.9,11.3,2.4mg/mL,and 24.5\,86.5\,38.4\,19.8μmol.min -1 .mg -1 ,respectively.The enzyme hydrolize various plant β mannans,with valuable oligosaccharides and without monosaccharide.

枯草芽孢杆菌 (Bacillussubtilis)BM960 2产生的中性内切 β 甘露聚糖酶 (endo β 1 ,4 D mannanmannanohydrolase ,EC ,3.2 .1 .78)经硫酸铵分级沉淀、DEAE 纤维素 (DE2 2 )离子交换柱层析 ,得到电泳纯的样品 ,提纯了 45 5倍 ,收率为 5 9%。用SDS PAGE测得该酶的分子量为 35kD。用PAGEIEF测得其等电点 pI为 4 5。酶反应的最适 pH为 5.8,最适温度为50℃。该酶在 pH6 0~ 8 0 ,50℃以下稳定。金属离子Hg2 +和Ag+对酶活性强烈抑制。酶对槐豆胶、羟丙基瓜胶、田菁胶和魔芋粉的Km 值分别为 3 8、1 4 9、1 1 3和 2 4mg/mL ,Vmax值分别为 2 4 5、86 5、38 4和 1 9 8μmol.min- 1 mg- 1 。酶水解甘露聚糖为甘露寡糖 (不含单糖 )。

 
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