过氧化氢酶(CAT)试剂盒

货号:G0105W
规格:
检测方法:微板法(内送酶标板)
检测仪器:酶标仪
价格:
数量:

产品介绍

过氧化氢酶(CAT,EC 1.11.1.6)普遍存在于植物动物组织中,其活性与生物体的代谢强度及抗寒、抗病能力有一定关系。本试剂盒提供一种简单,灵敏,快速的测定方法,即CAT 催化过氧化氢产生水与氧气,剩余的过氧化氢与一种新型显色探针显色,其在 510nm处有最大吸收峰。通过过氧化氢的减少量来计算样本中 CAT酶的活力。 本试剂盒突出特点是从紫外波长(240nm:过氧化氢的检测波长)转换到可见波长(510nm)检测,无需使用石英比色皿或UV板。而且由于过氧化氢极其不稳定,直接检测造成读值不稳定,且蛋白质等组分在此紫外波长下也有光吸收,影响结果精确性。

所需实验用品

酶标仪、台式离心机、可调式移液器、96孔板、研钵、冰和蒸馏水。

常见问题

1、试剂盒的运输
    生化试剂盒一般采用冰袋运输;运输中冰袋已融化并不会影响其质量,请放心使用。
2、试剂盒的保存:
    收到后,请在预实验前及时确认各组分量是否与说明书标注的一致,若有疑问请及时与我们技术联系(联系方式见说明书右下方),拆开包装后,请按照每个试剂的保存温度保存。
3、试剂盒有效期
     试剂盒大标签上显示试剂盒有效期,一般是3个月或6个月(具体以大标签为准)。粉体试剂加溶液后的保存周期,可参照说明书中“备注”一栏的说明(也可联系说明书下方的技术支持咨询确认)。
4、预实验五步法
    强烈建议客户选取2-3个预期结果差别较大的样本做预测定。
    目的:了解本批样品情况,熟悉实验流程,避免实验样本和试剂浪费!
    第一步:将试剂盒内的纸质版说明书通读一遍,核查试剂数量、状态(粉体、液体)及各组份的量与说明书是否一致,若无异常则按照规定温度存放。
    第二步:临用前取出试剂,溶解或者恢复至室温,以待使用。
    第三步:选择差异大的2-3个样本进行研磨提取,取上清液备用。
    第四步:根据说明书操作步骤进行预实验。
    第五步:待预实验确定好样本检测浓度、调整情况后,再批量进行正式实验。
5、分光法(F)与微板法(W)的区别
    F:指分光法;W:指微板法;
    分光法是指使用紫外可见分光光度计或可见分光光度计检测,分光法试剂盒(货号中带“F”),需要使用石英或玻璃比色皿;其规格是:光径:1cm,容积:1mL, 狭缝宽:3mm
    微板法指使用全波段连续酶标仪检测。微板法试剂盒(货号中带“W”),需要使用96孔酶标板或UV板,其规格是:U型底或平底、最大孔容量300μL
6、普通酶标板与UV板的区别?
    使用酶标仪检测时,如果波长大于等于340nm,使用普通的96孔板;但是波长小于340nm时,需要使用UV板(紫外酶标板);UV板(PS聚苯乙稀石英底)价格比较贵,但是可以清洗,重复使用。一般建议重复使用3-5次;
    最终测定的反应液为有机试剂时(乙酸乙酯、四氢呋喃等有机试剂),避免使用聚苯乙稀材质的96孔板。
7、分光法与微板法试剂盒能混用吗?
    不可以。两者原理几乎一样,但因反应体系、样本用量、试剂浓度、仪器和耗材都不同,并且混用后结果的准确性不能保证,不建议混用与任意改变体系。
8、市面上见到的50T/48S;100T/96S;120T/100S是什么意思?
     T:指测试(Test)次数;在实验室中,这通常指的是反应孔;每个反应孔可以是一个实验样本,或者对照;并不代表测的样本个数。50T是50个反应孔,不一定代表测50个样本; 100T、120T也是如此;
S:指可以测试的样本(Sample)个数;48样、96样:指可以检测48个样本、96个样本(不含重复)即得到48个、96个数据结果
9、官网上试剂盒规格标注的“48样”、“96样”是什么意思呢?
    “48样”、“96样”是试剂盒规格,我们定义了试剂盒可以测多少样,对于试剂盒需要的试剂量都给足的;一般会给到超出需用量的10-20%。
    48样、96样:指可以检测48个样本、96个样本(不含重复)即得到48个、96个最终的数据结果。格锐思生物的试剂盒48样可以测不少于50个样本;96样指可以测定不少于100个样本。
10、标准曲线是否需要重新做?
    一般不建议重新做标准曲线,标准曲线绘制会损耗试剂量,不够测到试剂盒规格的样本数量,另外我们的标准曲线是可以溯源,保证标曲的客观、真实、科学严谨,可以直接使用。
    a、格锐思针对需要标曲曲线的指标,给了标准曲线方程,同时给了标准曲线图,以证实我们的标曲是客观做出来的,不是理论推导的。
    b、格锐思同时给了标准曲线绘制的实验的步骤,客户对标曲有疑问的话,可以按照我们步骤,重新做标曲。
    c、格锐思根据标曲推导出最终的计算公式,客户只需要测出吸光值差值与样本重量就可以带入计算。
11、什么是冰浴匀浆?
    (1)使用研钵匀浆:将研钵置于冰盒上匀浆即冰浴匀浆。称取样本置于研钵中,研钵和提取液提前预冷或将研钵置于碎冰、冰盒上,加入一半量的提取液研磨均匀,转移至离心管中,再向研钵中加入另一半量的提取液涮洗研钵,转移至同一离心管中合并;
    (2)使用匀浆机进行匀浆:先把研磨模块提前放到-20℃预冷;然后将称好的组织放入离心管中,加入适量预冷的提取液、钢珠,按照匀浆机要求设定参数,进行研磨,动物植物组织都可以,对于纤维含量高,难磨样本可以提高赫兹和延长时间。或者多次反复研磨
    (3)使用液氮研磨后匀浆:样本液氮研磨成粉后,加入提取液再次按照(1)、(2)的方式研磨,或者放入超声波清洗仪300W超声5min,超声全程温度不得超过10℃。
12、样本的保存
    测常规指标,样本保存在-80℃下,一年以上都可以测;保存在-40℃下,半年之内都可以测;保存在-20℃下,三个月都没问题。

已发文章

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