重组人Cystatin SA/CST2蛋白-ACROBiosystems百普赛斯

Human Cystatin SA / CST2 Protein, His Tag

分子别名（Synonym）

CST2,Cystatin-2,Cystatin-SA,Cystatin-S5

表达区间及表达系统（Source）

Human Cystatin SA, His Tag (CS2-H5224) is expressed from human 293 cells (HEK293). It contains AA Trp 21 - Ala 141 (Accession # AAH62679).

Predicted N-terminus: Trp 21

蛋白结构（Molecular Characterization）

This protein carries a polyhistidine tag at the C-terminus.

The protein has a calculated MW of 15.2 kDa. The protein migrates as 15-16 kDa under reducing (R) condition (SDS-PAGE).

内毒素（Endotoxin）

Less than 1.0 EU per μg by the LAL method.

纯度（Purity）

>95% as determined by SDS-PAGE.

制剂（Formulation）

Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 150 mM NaCl, pH8.0 with trehalose as protectant.

Contact us for customized product form or formulation.

重构方法（Reconstitution）

Please see Certificate of Analysis for specific instructions.

For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

存储（Storage）

For long term storage, the product should be stored at lyophilized state at -20°C or lower.

Please avoid repeated freeze-thaw cycles.

This product is stable after storage at:

-20°C to -70°C for 12 months in lyophilized state;

-70°C for 3 months under sterile conditions after reconstitution.

背景（Background）

半胱氨酸蛋白酶抑制剂2（CST2）也称为半胱氨酸蛋白酶抑制剂SA，半胱氨酸蛋白酶抑制剂S5，是一种分泌型巯基蛋白酶抑制剂，属于半胱氨酸蛋白酶抑制剂家族。2型半胱氨酸蛋白酶抑制剂是一类半胱氨酸蛋白酶抑制剂，存在于各种人体液体和分泌物中，似乎具有保护功能。CST1、CST2、CST4和CST5以不同的组织特异性模式表达。CST2在颌下腺和舌下唾液中表达，但在腮腺唾液中不表达（在蛋白质水平上），也在颌下腺和腮腺中表达。