General Notes
This product (Catalog No. DPABH-03622) is a rabbit-derived IgG polyclonal antibody raised against human CST4, targeting the amino acid region 51–141 of the protein. It has been affinity purified by Protein A. The cystatin superfamily encompasses proteins that contain multiple cystatin-like sequences. Some of the members are active cysteine protease inhibitors, while others have lost or perhaps never acquired this inhibitory activity. There are three inhibitory families in the superfamily, including the type 1 cystatins (stefins), type 2 cystatins and the kininogens. The type 2 cystatin proteins are a class of cysteine proteinase inhibitors found in a variety of human fluids and secretions. The cystatin locus on chromosome 20 contains the majority of the type 2 cystatin genes and pseudogenes. This gene is located in the cystatin locus and encodes a type 2 salivary cysteine peptidase inhibitor. The protein is an S-type cystatin, based on its high level of expression in saliva, tears and seminal plasma. The specific role in these fluids is unclear but antibacterial and antiviral activity is present, consistent with a protective function.
DPABH-03622 is suitable for use in IHC-P (1:100–1:500), IHC-F (1:100–1:500), IF (immunofluorescence) (1:100–1:500), ELISA (1:5,000–1:10,000) applications.
DPABH-03622 is supplied as a liquid formulation in 0.01M TBS (pH7.4) with 1% BSA, 0.02% Proclin300 and 50% Glycerol. For long-term storage, keep at −20 °C. For short-term use, store at 2–8 °C. Avoid repeated freeze–thaw cycles to maintain antibody integrity and performance.
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