Human Cystatin S / CST4 Protein

内毒素:
Less than 1.0 EU per μg by the LAL method.

纯度:
>95% as determined by SDS-PAGE.

活性:


产品背景:
Cystatin-4 (CST4) is also known as Cystatin-S, Salivary acidic protein 1, which is a secreted protein, which belongs to the cystatin family. Cystatin-S is expressed in submandibular and sublingual saliva but not in parotid saliva (at protein level) and is also expressed in saliva, tears, urine and seminal fluid. Cystatin-4 / Cystatin S strongly inhibits papain and ficin, partially inhibits stem bromelain and bovine cathepsin C, but does not inhibit porcine cathepsin B or clostripain. Papain is inhibited non-competitively.

产品描述:
Human Cystatin S, His Tag is fused with a polyhistidine tag at the C-terminus, and has a calculated MW of 15 kDa. The predicted N-terminus is Ser 21. The reducing (R) protein migrates as 15 kDa in SDS-PAGE.