所有图片(2)

T7309

Sigma-Aldrich

胰蛋白酶 来源于牛胰腺

≥2,500 USP units/mg solid, meets USP testing specifications

CAS号:
EC 号:
MDL编号:
NACRES:
NA.54

质量水平

300

agency

USP/NF
meets USP testing specifications

形式

solid

specific activity

≥2,500 USP units/mg solid

分子量

23.8 kDa

纯化方式

crystallization

溶解性

H2O: soluble
saline: soluble

application(s)

diagnostic assay manufacturing

储存温度

−20°C

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应用

对于胰蛋白酶消化肽,胰蛋白酶:肽 使用约为 1:100 至 1:20 的比例。从培养表面除去粘附细胞是本产品的一个典型应用。 从其底物中去除细胞所需的胰蛋白酶浓度主要取决于细胞类型和培养物的年龄。 胰蛋白酶也被用于细胞培养期间细胞的再悬浮、蛋白质组学研究中的蛋白质消化和各种凝胶内消化。 其他应用包括:通过基于膜的技术评估结晶,用在确定动力学陷阱的存在会限制蛋白质的折叠速率和产量的一项研究中。

包装

1, 10 g in glass bottle

生化/生理作用

胰蛋白酶切割赖氨酸和精氨酸残基的 C 端肽。 如果酸性残基位于切割位点的任一侧,则该反应的水解速度减慢,并且如果脯氨酸残基位于切割位点的羧基侧,则停止水解。 胰蛋白酶活性的最适 pH 为 7-9。 胰蛋白酶还可以起到裂解氨基酸合成衍生物的酯和酰胺键的作用。 将 EDTA 作为螯合剂添加到胰蛋白酶溶液中,用于中和钙离子和镁离子,这些离子遮蔽胰蛋白酶作用的肽键。 去除这些离子会增加酶活性。

丝氨酸蛋白酶抑制剂,包括 DFP、TLCK、APMSF、AEBSEF 和抑肽酶等,将抑制胰蛋白酶。

组分

胰蛋白酶由223个氨基酸残基的单链多肽组成,其通过从胰蛋白酶原去除N-末端六肽而产生(在Lys-Ile肽键处被切割)。氨基酸序列通过6个二硫键交联。这是胰蛋白酶、β-胰蛋白酶的天然形式。β-胰蛋白酶可以在Lys-Ser残基处发生自裂解,并产生α -胰蛋白酶。胰蛋白酶是丝氨酸蛋白酶家族的成员。

注意

1mM HCl中的溶液以等分试样形式可在-20℃稳定储存1年。Ca2+的存在也可减少胰蛋白酶的自溶并保持其在溶液中的稳定性。胰蛋白酶还可在2.0M尿素、2.0M盐酸胍或0.1%(w / v)SDS中保留其大部分活性。

单位定义

使用 BAEE 作为底物,一个 BAEE 单元,将在 pH 7.6,25℃ 下,每分钟产生 0.001 的 A253

制备说明

以1 mg/mL的浓度溶于1 mM HCl。

象形图

Exclamation markHealth hazard

警示用语:

Danger

危险分类

Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3

靶器官

Respiratory system

储存分类代码

11 - Combustible Solids

WGK

WGK 1

个人防护装备

dust mask type N95 (US), Eyeshields, Faceshields, Gloves

分析证书

原产地证书 (CofO)

Shuo Sui et al.
Journal of applied crystallography, 54(Pt 4), 1034-1046 (2021-08-26)
A novel capillary-based microfluidic strategy to accelerate the process of small-molecule-compound screening by room-temperature X-ray crystallography using protein crystals is reported. The ultra-thin microfluidic devices are composed of a UV-curable polymer, patterned by cleanroom photolithography, and have nine capillary channels
Junchi He et al.
Experimental neurology, 334, 113462-113462 (2020-09-12)
Traumatic brain injury (TBI) has been regarded as one of the leading cause of injury-related death and disability. White matter injury after TBI is characterized by axon damage and demyelination, resulting in neural network impairment and neurological deficit. Brain-derived neurotrophic
Monika Gulia-Nuss et al.
PloS one, 6(5), e20401-e20401 (2011-06-08)
Mosquitoes are insects that vector many serious pathogens to humans and other vertebrates. Most mosquitoes must feed on the blood of a vertebrate host to produce eggs. In turn, multiple cycles of blood feeding promote frequent contacts with hosts and
Olivier Rivoire
Physical review letters, 110(17), 178102-178102 (2013-05-18)
Studies of coevolution of amino acids within and between proteins have revealed two types of coevolving units: coevolving contacts, which are pairs of amino acids distant along the sequence but in contact in the three-dimensional structure, and sectors, which are
Janina Boyken et al.
Neuron, 78(2), 285-297 (2013-04-30)
Neurotransmission involves calcium-triggered fusion of docked synaptic vesicles at specialized presynaptic release sites. While many of the participating proteins have been identified, the molecular composition of these sites has not been characterized comprehensively. Here, we report a procedure to biochemically

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