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名称
胰蛋白酶 来源于猪胰腺
货号
T755927-1g
包装规格
1g
级别
生物活性
浓度
13,000-20,000 BAEE U/mg powder
产品介绍
胰蛋白酶由223个氨基酸残基组成的单链多肽组成,通过去除胰蛋白酶原的N-末端六肽而产生,胰蛋白酶原在 Lys-lle 肽键处裂解。氨基酸序列由6个二硫键交联。这是胰蛋白酶的天然形式,β-胰蛋白酶。β-胰蛋白酶可自溶,在赖氨酸残基处裂解,生成α-胰蛋白酶。胰蛋白酶是丝氨酸蛋白酶家族的一员。 处理说明 可溶于1 mM盐酸(2 mg/ml),产生澄清溶液。 在1 mM盐酸pH=3中,溶液在分装后于-20℃储存可保 持活性长达~1年。Ca2+(20 mM)的存在也会延缓胰蛋白酶的自溶,并维持溶液中胰蛋白酶的稳定性。胰蛋白酶在2.0摩尔/升尿素、2.0摩尔/升胍盐酸或0.1%(重量/体积)SDS中仍保留大部分活性。胰蛋白酶在高pH值(高于11)下、用三氯乙酸沉淀或高浓度尿素(超过6.5摩尔/升)作用下可逆变性。 *为了完全消除胰蛋白酶活性,需要在1%(重量/体积)SDS中100 摄氏度加热5分钟。 产品应用 1、使贴壁细胞从培养表面脱落。 2、使细胞解离所需的胰蛋白酶浓度主要取决于细胞类型和培养物代数。 3、用于细胞培养过程中的细胞再悬浮,在蛋白质组学研究中用于蛋白质的消化,以及在各种凝胶消化中。 4、通过基于膜的技术评估结晶,以及在一项研究中确定蛋白质折叠速率和产量可以被动力学陷阱的存在所限制。
生化机理
Trypsin cleaves peptides on the C-terminal side of lysine and arginine residues. The rate of hydrolysis of this reaction is slowed if an acidic residue is on either side of the cleavage site and hydrolysis is stopped if a proline residue is on the carboxyl side of the cleavage site. The optimal pH for trypsin activity is 7-9. Trypsin can also act to cleave ester and amide linkages of synthetic derivatives of amino acids. EDTA is added to trypsin solutions as a chelating agent that neutralizes calcium and magnesium ions that obscure the peptide bonds on which trypsin acts. Removing these ions increases the enzymatic activity. Serine protease inhibitors, including DFP, TLCK, APMSF, AEBSEF, and aprotinin, amongst others, will inhibit Trypsin.
生物活性
13,000-20,000 BAEE U/mg powder
来源
天然
种属
Pig
Safety
「No Dangerous Attributes」
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Research chemical 1g

Research chemical 1g; supplied for laboratory research, analysis, inspection, and scientific procurement use; specifications: 1g.

item number:T755927-1g
Product model:1g
level: 1g
Lead Time:30days
sold 270 Items
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