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Immunofluorescence (IF) (Immunofluorescence staining of Human CST4 in Hela cells. Cells were fixed with 4% PFA, permeabilzed with 0.3% Triton X-100 in PBS, blocked with 10% serum, and incubated with rabbit anti-Human CST4 monoclonal antibody (1:60) at 37 degree C 1 hour. Then cells were stained with the Alexa Fluor 594-conjugated goat Anti-rabbit IgG secondary antibody (red) and counterstained with DAPI (blue). Positive staining was localized to cytoplasm.)

Rabbit anti-Human Cystatin S Monoclonal Antibody | anti-CST4 antibody

Recombinant Anti-Cystatin S Antibody, Rabbit Monoclonal

Reactivity
Human
Applications
ELISA, Flow Cytometry, Functional Assay, Immunocytochemistry, Immunofluorescence
Purity
Protein A
Synonyms
Cystatin S; Monoclonal Antibody; Recombinant Anti-Cystatin S Antibody; Rabbit Monoclonal; Cystatin S/CST4 Antibody; Rabbit MAb; cystatin S; Anti-CST4 Antibody; Anti-MGC71923 Antibody; anti-CST4 antibody
Ordering
For Research Use Only!
Host
Rabbit
Reactivity
Human
Clonality
Monoclonal
Isotype
Rabbit IgG
Clone Number
006
Specificity
Human Cystatin S/CST4
Purity/Purification
Protein A
Form/Format
Liquid; 0.2um filtered solution in PBS
Applicable Applications for anti-CST4 antibody
ELISA (EIA), Flow Cytometry (FC/FACS/FCM), Immunocytochemistry (ICC), Immunofluorescence (IF)
Application Notes
ELISA: 1:5000-1:10,000
ICC/IF: 1:20-1:100
FC/FACS/FCM: 1:25-1:100
Antibody Type
Recombinant Antibody
Immunogen
Recombinant Human Cystatin S/CST4 protein
Conjugation
Unconjugated
Preparation
This antibody was obtained from a rabbit immunized with purified, recombinant Human Cystatin S/CST4 (rh Cystatin S/CST4).
Preparation and Storage
This antibody can be stored at 2-8 degree C for one month without detectable loss of activity. Antibody products are stable for twelve months from date of receipt when stored at -20 degree C to -80 degree C. Preservative-Free. Avoid repeated freeze-thaw cycles.

Immunofluorescence (IF)

(Immunofluorescence staining of Human CST4 in Hela cells. Cells were fixed with 4% PFA, permeabilzed with 0.3% Triton X-100 in PBS, blocked with 10% serum, and incubated with rabbit anti-Human CST4 monoclonal antibody (1:60) at 37 degree C 1 hour. Then cells were stained with the Alexa Fluor 594-conjugated goat Anti-rabbit IgG secondary antibody (red) and counterstained with DAPI (blue). Positive staining was localized to cytoplasm.)

Immunofluorescence (IF) (Immunofluorescence staining of Human CST4 in Hela cells. Cells were fixed with 4% PFA, permeabilzed with 0.3% Triton X-100 in PBS, blocked with 10% serum, and incubated with rabbit anti-Human CST4 monoclonal antibody (1:60) at 37 degree C 1 hour. Then cells were stained with the Alexa Fluor 594-conjugated goat Anti-rabbit IgG secondary antibody (red) and counterstained with DAPI (blue). Positive staining was localized to cytoplasm.)

Flow Cytometry (FC/FACS)

(Flow cytometric analysis of Human CST4 expression on HeLa cells. The cells were treated according to manufacturer's manual (BD Pharmingen'), stained with purified anti-Human CST4, then a FITC-conjugated second step antibody. The fluorescence histograms were derived from gated events with the forward and side light-scatter characteristics of intact cells.)

Flow Cytometry (FC/FACS) (Flow cytometric analysis of Human CST4 expression on HeLa cells. The cells were treated according to manufacturer's manual (BD Pharmingen'), stained with purified anti-Human CST4, then a FITC-conjugated second step antibody. The fluorescence histograms were derived from gated events with the forward and side light-scatter characteristics of intact cells.)
Related Product Information for anti-CST4 antibody
Cystatin-S, also known as Cystatin-4, Salivary acidic protein 1, Cystatin-SA-III and CST4, is a secreted protein which belongs to thecystatin family. Cystatin-4/CST4 is expressed in submandibular and sublingual saliva but not in parotid saliva (at protein level). It is also expressed in saliva, tears, urine and seminal fluid. 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. Cystatin-4/CST4 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. Cystatin-4/CST4 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.
References
Bobek L.A., et al., (1991), Human salivary cystatin S. Cloning, sequence analysis, hybridization in situ and immunocytochemistry. Biochem. J. 278:627-635.Saitoh E., et al., (1992), Characterization of two members (CST4 and CST5) of the cystatin gene family and molecular evolution of cystatin genes.Agents Actions 38:340-348.Deloukas P., et al., (2001), The DNA sequence and comparative analysis of human chromosome 20.Nature 414:865-871.

NCBI and Uniprot Product Information

NCBI GI #
NCBI GeneID
NCBI Accession #
NCBI GenBank Nucleotide #
UniProt Accession #
Molecular Weight
16,214 Da
NCBI Official Full Name
cystatin-S
NCBI Official Synonym Full Names
cystatin S
NCBI Official Symbol
CST4
NCBI Protein Information
cystatin-S; cystatin 4; cystatin-4; cystatin-SA-III; salivary acidic protein 1
UniProt Protein Name
Cystatin-S
Protein Family
UniProt Gene Name
CST4
UniProt Entry Name
CYTS_HUMAN

NCBI Description

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. [provided by RefSeq, Jul 2008]

Uniprot Description

CST4: This protein 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. Belongs to the cystatin family.

Protein type: Inhibitor; Secreted; Secreted, signal peptide

Chromosomal Location of Human Ortholog: 20p11.21

Cellular Component: extracellular space

Molecular Function: cysteine protease inhibitor activity

Biological Process: negative regulation of proteolysis; retinal homeostasis; detection of chemical stimulus involved in sensory perception of bitter taste

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Product Notes

The CST4 cst4 (Catalog #AAA8105404) is an Antibody produced from Rabbit and is intended for research purposes only. The product is available for immediate purchase. The Recombinant Anti-Cystatin S Antibody, Rabbit Monoclonal reacts with Human and may cross-react with other species as described in the data sheet. AAA Biotech's Cystatin S can be used in a range of immunoassay formats including, but not limited to, ELISA (EIA), Flow Cytometry (FC/FACS/FCM), Immunocytochemistry (ICC), Immunofluorescence (IF). ELISA: 1:5000-1:10,000 ICC/IF: 1:20-1:100 FC/FACS/FCM: 1:25-1:100. Researchers should empirically determine the suitability of the CST4 cst4 for an application not listed in the data sheet. Researchers commonly develop new applications and it is an integral, important part of the investigative research process. It is sometimes possible for the material contained within the vial of "Cystatin S, Monoclonal Antibody" to become dispersed throughout the inside of the vial, particularly around the seal of said vial, during shipment and storage. We always suggest centrifuging these vials to consolidate all of the liquid away from the lid and to the bottom of the vial prior to opening. Please be advised that certain products may require dry ice for shipping and that, if this is the case, an additional dry ice fee may also be required.

Precautions

All products in the AAA Biotech catalog are strictly for research-use only, and are absolutely not suitable for use in any sort of medical, therapeutic, prophylactic, in-vivo, or diagnostic capacity. By purchasing a product from AAA Biotech, you are explicitly certifying that said products will be properly tested and used in line with industry standard. AAA Biotech and its authorized distribution partners reserve the right to refuse to fulfill any order if we have any indication that a purchaser may be intending to use a product outside of our accepted criteria.

Disclaimer

Though we do strive to guarantee the information represented in this datasheet, AAA Biotech cannot be held responsible for any oversights or imprecisions. AAA Biotech reserves the right to adjust any aspect of this datasheet at any time and without notice. It is the responsibility of the customer to inform AAA Biotech of any product performance issues observed or experienced within 30 days of receipt of said product. To see additional details on this or any of our other policies, please see our Terms & Conditions page.

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