Cystatins are a superfamily of cysteine proteinase inhibitors found in both plants and animals. They comprise a group of proteinase inhibitors， widely distributed in tissues and body fluids， and form tight complexes with cysteine proteases such as cathepsin B， H， L and S. Cystatin C， a secreted molecule of this family， is of interest from biochemical， medicine and evolutionary points of view. Cystatin C， with molecular weight of 13260 Da， is composed of 120 amino acids， lacks carbohydrate and has two disulfide bridges located near the carboxyl terminus. Cystatin C is increased in patients with malignant diseases， and is related to the insufficiency of renal function and appears to be a better marker than creatinine. On the other hand， low levels of cystatin C involve cause the breakdown of the elastic laminae and， subsequently， the atherosclerosis and abdominal aortic aneurysm.
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來源宿主
人尿液中提取純化
溶解建議
Sterile Filtered White lyophilized （freeze-dried） powder. Lyophilized from 0.02M NH4HCO3. May contain traces of buffer salts. Use of a 0.02M NH4HCO3 buffer is recommended.
保存建議
Should be stored between 2-8℃.
Minimum shelf life 2 years.
